summaryrefslogtreecommitdiffstats
path: root/drivers/thunderbolt/tb.h
blob: a9995e21b9165e6a367697248c51e40cb4435bf3 (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
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Thunderbolt driver - bus logic (NHI independent)
 *
 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
 * Copyright (C) 2018, Intel Corporation
 */

#ifndef TB_H_
#define TB_H_

#include <linux/nvmem-provider.h>
#include <linux/pci.h>
#include <linux/thunderbolt.h>
#include <linux/uuid.h>

#include "tb_regs.h"
#include "ctl.h"
#include "dma_port.h"

#define NVM_MIN_SIZE		SZ_32K
#define NVM_MAX_SIZE		SZ_512K

/* Intel specific NVM offsets */
#define NVM_DEVID		0x05
#define NVM_VERSION		0x08
#define NVM_FLASH_SIZE		0x45

/**
 * struct tb_nvm - Structure holding NVM information
 * @dev: Owner of the NVM
 * @major: Major version number of the active NVM portion
 * @minor: Minor version number of the active NVM portion
 * @id: Identifier used with both NVM portions
 * @active: Active portion NVMem device
 * @non_active: Non-active portion NVMem device
 * @buf: Buffer where the NVM image is stored before it is written to
 *	 the actual NVM flash device
 * @buf_data_size: Number of bytes actually consumed by the new NVM
 *		   image
 * @authenticating: The device is authenticating the new NVM
 * @flushed: The image has been flushed to the storage area
 *
 * The user of this structure needs to handle serialization of possible
 * concurrent access.
 */
struct tb_nvm {
	struct device *dev;
	u8 major;
	u8 minor;
	int id;
	struct nvmem_device *active;
	struct nvmem_device *non_active;
	void *buf;
	size_t buf_data_size;
	bool authenticating;
	bool flushed;
};

#define TB_SWITCH_KEY_SIZE		32
#define TB_SWITCH_MAX_DEPTH		6
#define USB4_SWITCH_MAX_DEPTH		5

/**
 * enum tb_switch_tmu_rate - TMU refresh rate
 * @TB_SWITCH_TMU_RATE_OFF: %0 (Disable Time Sync handshake)
 * @TB_SWITCH_TMU_RATE_HIFI: %16 us time interval between successive
 *			     transmission of the Delay Request TSNOS
 *			     (Time Sync Notification Ordered Set) on a Link
 * @TB_SWITCH_TMU_RATE_NORMAL: %1 ms time interval between successive
 *			       transmission of the Delay Request TSNOS on
 *			       a Link
 */
enum tb_switch_tmu_rate {
	TB_SWITCH_TMU_RATE_OFF = 0,
	TB_SWITCH_TMU_RATE_HIFI = 16,
	TB_SWITCH_TMU_RATE_NORMAL = 1000,
};

/**
 * struct tb_switch_tmu - Structure holding switch TMU configuration
 * @cap: Offset to the TMU capability (%0 if not found)
 * @has_ucap: Does the switch support uni-directional mode
 * @rate: TMU refresh rate related to upstream switch. In case of root
 *	  switch this holds the domain rate.
 * @unidirectional: Is the TMU in uni-directional or bi-directional mode
 *		    related to upstream switch. Don't case for root switch.
 */
struct tb_switch_tmu {
	int cap;
	bool has_ucap;
	enum tb_switch_tmu_rate rate;
	bool unidirectional;
};

/**
 * struct tb_switch - a thunderbolt switch
 * @dev: Device for the switch
 * @config: Switch configuration
 * @ports: Ports in this switch
 * @dma_port: If the switch has port supporting DMA configuration based
 *	      mailbox this will hold the pointer to that (%NULL
 *	      otherwise). If set it also means the switch has
 *	      upgradeable NVM.
 * @tmu: The switch TMU configuration
 * @tb: Pointer to the domain the switch belongs to
 * @uid: Unique ID of the switch
 * @uuid: UUID of the switch (or %NULL if not supported)
 * @vendor: Vendor ID of the switch
 * @device: Device ID of the switch
 * @vendor_name: Name of the vendor (or %NULL if not known)
 * @device_name: Name of the device (or %NULL if not known)
 * @link_speed: Speed of the link in Gb/s
 * @link_width: Width of the link (1 or 2)
 * @link_usb4: Upstream link is USB4
 * @generation: Switch Thunderbolt generation
 * @cap_plug_events: Offset to the plug events capability (%0 if not found)
 * @cap_lc: Offset to the link controller capability (%0 if not found)
 * @is_unplugged: The switch is going away
 * @drom: DROM of the switch (%NULL if not found)
 * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise)
 * @no_nvm_upgrade: Prevent NVM upgrade of this switch
 * @safe_mode: The switch is in safe-mode
 * @boot: Whether the switch was already authorized on boot or not
 * @rpm: The switch supports runtime PM
 * @authorized: Whether the switch is authorized by user or policy
 * @security_level: Switch supported security level
 * @debugfs_dir: Pointer to the debugfs structure
 * @key: Contains the key used to challenge the device or %NULL if not
 *	 supported. Size of the key is %TB_SWITCH_KEY_SIZE.
 * @connection_id: Connection ID used with ICM messaging
 * @connection_key: Connection key used with ICM messaging
 * @link: Root switch link this switch is connected (ICM only)
 * @depth: Depth in the chain this switch is connected (ICM only)
 * @rpm_complete: Completion used to wait for runtime resume to
 *		  complete (ICM only)
 * @quirks: Quirks used for this Thunderbolt switch
 *
 * When the switch is being added or removed to the domain (other
 * switches) you need to have domain lock held.
 */
struct tb_switch {
	struct device dev;
	struct tb_regs_switch_header config;
	struct tb_port *ports;
	struct tb_dma_port *dma_port;
	struct tb_switch_tmu tmu;
	struct tb *tb;
	u64 uid;
	uuid_t *uuid;
	u16 vendor;
	u16 device;
	const char *vendor_name;
	const char *device_name;
	unsigned int link_speed;
	unsigned int link_width;
	bool link_usb4;
	unsigned int generation;
	int cap_plug_events;
	int cap_lc;
	bool is_unplugged;
	u8 *drom;
	struct tb_nvm *nvm;
	bool no_nvm_upgrade;
	bool safe_mode;
	bool boot;
	bool rpm;
	unsigned int authorized;
	enum tb_security_level security_level;
	struct dentry *debugfs_dir;
	u8 *key;
	u8 connection_id;
	u8 connection_key;
	u8 link;
	u8 depth;
	struct completion rpm_complete;
	unsigned long quirks;
};

/**
 * struct tb_port - a thunderbolt port, part of a tb_switch
 * @config: Cached port configuration read from registers
 * @sw: Switch the port belongs to
 * @remote: Remote port (%NULL if not connected)
 * @xdomain: Remote host (%NULL if not connected)
 * @cap_phy: Offset, zero if not found
 * @cap_tmu: Offset of the adapter specific TMU capability (%0 if not present)
 * @cap_adap: Offset of the adapter specific capability (%0 if not present)
 * @cap_usb4: Offset to the USB4 port capability (%0 if not present)
 * @port: Port number on switch
 * @disabled: Disabled by eeprom or enabled but not implemented
 * @bonded: true if the port is bonded (two lanes combined as one)
 * @dual_link_port: If the switch is connected using two ports, points
 *		    to the other port.
 * @link_nr: Is this primary or secondary port on the dual_link.
 * @in_hopids: Currently allocated input HopIDs
 * @out_hopids: Currently allocated output HopIDs
 * @list: Used to link ports to DP resources list
 */
struct tb_port {
	struct tb_regs_port_header config;
	struct tb_switch *sw;
	struct tb_port *remote;
	struct tb_xdomain *xdomain;
	int cap_phy;
	int cap_tmu;
	int cap_adap;
	int cap_usb4;
	u8 port;
	bool disabled;
	bool bonded;
	struct tb_port *dual_link_port;
	u8 link_nr:1;
	struct ida in_hopids;
	struct ida out_hopids;
	struct list_head list;
};

/**
 * tb_retimer: Thunderbolt retimer
 * @dev: Device for the retimer
 * @tb: Pointer to the domain the retimer belongs to
 * @index: Retimer index facing the router USB4 port
 * @vendor: Vendor ID of the retimer
 * @device: Device ID of the retimer
 * @port: Pointer to the lane 0 adapter
 * @nvm: Pointer to the NVM if the retimer has one (%NULL otherwise)
 * @auth_status: Status of last NVM authentication
 */
struct tb_retimer {
	struct device dev;
	struct tb *tb;
	u8 index;
	u32 vendor;
	u32 device;
	struct tb_port *port;
	struct tb_nvm *nvm;
	u32 auth_status;
};

/**
 * struct tb_path_hop - routing information for a tb_path
 * @in_port: Ingress port of a switch
 * @out_port: Egress port of a switch where the packet is routed out
 *	      (must be on the same switch than @in_port)
 * @in_hop_index: HopID where the path configuration entry is placed in
 *		  the path config space of @in_port.
 * @in_counter_index: Used counter index (not used in the driver
 *		      currently, %-1 to disable)
 * @next_hop_index: HopID of the packet when it is routed out from @out_port
 * @initial_credits: Number of initial flow control credits allocated for
 *		     the path
 *
 * Hop configuration is always done on the IN port of a switch.
 * in_port and out_port have to be on the same switch. Packets arriving on
 * in_port with "hop" = in_hop_index will get routed to through out_port. The
 * next hop to take (on out_port->remote) is determined by
 * next_hop_index. When routing packet to another switch (out->remote is
 * set) the @next_hop_index must match the @in_hop_index of that next
 * hop to make routing possible.
 *
 * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
 * port.
 */
struct tb_path_hop {
	struct tb_port *in_port;
	struct tb_port *out_port;
	int in_hop_index;
	int in_counter_index;
	int next_hop_index;
	unsigned int initial_credits;
};

/**
 * enum tb_path_port - path options mask
 * @TB_PATH_NONE: Do not activate on any hop on path
 * @TB_PATH_SOURCE: Activate on the first hop (out of src)
 * @TB_PATH_INTERNAL: Activate on the intermediate hops (not the first/last)
 * @TB_PATH_DESTINATION: Activate on the last hop (into dst)
 * @TB_PATH_ALL: Activate on all hops on the path
 */
enum tb_path_port {
	TB_PATH_NONE = 0,
	TB_PATH_SOURCE = 1,
	TB_PATH_INTERNAL = 2,
	TB_PATH_DESTINATION = 4,
	TB_PATH_ALL = 7,
};

/**
 * struct tb_path - a unidirectional path between two ports
 * @tb: Pointer to the domain structure
 * @name: Name of the path (used for debugging)
 * @nfc_credits: Number of non flow controlled credits allocated for the path
 * @ingress_shared_buffer: Shared buffering used for ingress ports on the path
 * @egress_shared_buffer: Shared buffering used for egress ports on the path
 * @ingress_fc_enable: Flow control for ingress ports on the path
 * @egress_fc_enable: Flow control for egress ports on the path
 * @priority: Priority group if the path
 * @weight: Weight of the path inside the priority group
 * @drop_packages: Drop packages from queue tail or head
 * @activated: Is the path active
 * @clear_fc: Clear all flow control from the path config space entries
 *	      when deactivating this path
 * @hops: Path hops
 * @path_length: How many hops the path uses
 *
 * A path consists of a number of hops (see &struct tb_path_hop). To
 * establish a PCIe tunnel two paths have to be created between the two
 * PCIe ports.
 */
struct tb_path {
	struct tb *tb;
	const char *name;
	int nfc_credits;
	enum tb_path_port ingress_shared_buffer;
	enum tb_path_port egress_shared_buffer;
	enum tb_path_port ingress_fc_enable;
	enum tb_path_port egress_fc_enable;

	unsigned int priority:3;
	int weight:4;
	bool drop_packages;
	bool activated;
	bool clear_fc;
	struct tb_path_hop *hops;
	int path_length;
};

/* HopIDs 0-7 are reserved by the Thunderbolt protocol */
#define TB_PATH_MIN_HOPID	8
/*
 * Support paths from the farthest (depth 6) router to the host and back
 * to the same level (not necessarily to the same router).
 */
#define TB_PATH_MAX_HOPS	(7 * 2)

/* Possible wake types */
#define TB_WAKE_ON_CONNECT	BIT(0)
#define TB_WAKE_ON_DISCONNECT	BIT(1)
#define TB_WAKE_ON_USB4		BIT(2)
#define TB_WAKE_ON_USB3		BIT(3)
#define TB_WAKE_ON_PCIE		BIT(4)

/**
 * struct tb_cm_ops - Connection manager specific operations vector
 * @driver_ready: Called right after control channel is started. Used by
 *		  ICM to send driver ready message to the firmware.
 * @start: Starts the domain
 * @stop: Stops the domain
 * @suspend_noirq: Connection manager specific suspend_noirq
 * @resume_noirq: Connection manager specific resume_noirq
 * @suspend: Connection manager specific suspend
 * @freeze_noirq: Connection manager specific freeze_noirq
 * @thaw_noirq: Connection manager specific thaw_noirq
 * @complete: Connection manager specific complete
 * @runtime_suspend: Connection manager specific runtime_suspend
 * @runtime_resume: Connection manager specific runtime_resume
 * @runtime_suspend_switch: Runtime suspend a switch
 * @runtime_resume_switch: Runtime resume a switch
 * @handle_event: Handle thunderbolt event
 * @get_boot_acl: Get boot ACL list
 * @set_boot_acl: Set boot ACL list
 * @approve_switch: Approve switch
 * @add_switch_key: Add key to switch
 * @challenge_switch_key: Challenge switch using key
 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths
 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths
 */
struct tb_cm_ops {
	int (*driver_ready)(struct tb *tb);
	int (*start)(struct tb *tb);
	void (*stop)(struct tb *tb);
	int (*suspend_noirq)(struct tb *tb);
	int (*resume_noirq)(struct tb *tb);
	int (*suspend)(struct tb *tb);
	int (*freeze_noirq)(struct tb *tb);
	int (*thaw_noirq)(struct tb *tb);
	void (*complete)(struct tb *tb);
	int (*runtime_suspend)(struct tb *tb);
	int (*runtime_resume)(struct tb *tb);
	int (*runtime_suspend_switch)(struct tb_switch *sw);
	int (*runtime_resume_switch)(struct tb_switch *sw);
	void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type,
			     const void *buf, size_t size);
	int (*get_boot_acl)(struct tb *tb, uuid_t *uuids, size_t nuuids);
	int (*set_boot_acl)(struct tb *tb, const uuid_t *uuids, size_t nuuids);
	int (*approve_switch)(struct tb *tb, struct tb_switch *sw);
	int (*add_switch_key)(struct tb *tb, struct tb_switch *sw);
	int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw,
				    const u8 *challenge, u8 *response);
	int (*disconnect_pcie_paths)(struct tb *tb);
	int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
	int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
};

static inline void *tb_priv(struct tb *tb)
{
	return (void *)tb->privdata;
}

#define TB_AUTOSUSPEND_DELAY		15000 /* ms */

/* helper functions & macros */

/**
 * tb_upstream_port() - return the upstream port of a switch
 *
 * Every switch has an upstream port (for the root switch it is the NHI).
 *
 * During switch alloc/init tb_upstream_port()->remote may be NULL, even for
 * non root switches (on the NHI port remote is always NULL).
 *
 * Return: Returns the upstream port of the switch.
 */
static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
{
	return &sw->ports[sw->config.upstream_port_number];
}

/**
 * tb_is_upstream_port() - Is the port upstream facing
 * @port: Port to check
 *
 * Returns true if @port is upstream facing port. In case of dual link
 * ports both return true.
 */
static inline bool tb_is_upstream_port(const struct tb_port *port)
{
	const struct tb_port *upstream_port = tb_upstream_port(port->sw);
	return port == upstream_port || port->dual_link_port == upstream_port;
}

static inline u64 tb_route(const struct tb_switch *sw)
{
	return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
}

static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
{
	u8 port;

	port = route >> (sw->config.depth * 8);
	if (WARN_ON(port > sw->config.max_port_number))
		return NULL;
	return &sw->ports[port];
}

/**
 * tb_port_has_remote() - Does the port have switch connected downstream
 * @port: Port to check
 *
 * Returns true only when the port is primary port and has remote set.
 */
static inline bool tb_port_has_remote(const struct tb_port *port)
{
	if (tb_is_upstream_port(port))
		return false;
	if (!port->remote)
		return false;
	if (port->dual_link_port && port->link_nr)
		return false;

	return true;
}

static inline bool tb_port_is_null(const struct tb_port *port)
{
	return port && port->port && port->config.type == TB_TYPE_PORT;
}

static inline bool tb_port_is_nhi(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_NHI;
}

static inline bool tb_port_is_pcie_down(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_PCIE_DOWN;
}

static inline bool tb_port_is_pcie_up(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_PCIE_UP;
}

static inline bool tb_port_is_dpin(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_DP_HDMI_IN;
}

static inline bool tb_port_is_dpout(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_DP_HDMI_OUT;
}

static inline bool tb_port_is_usb3_down(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_USB3_DOWN;
}

static inline bool tb_port_is_usb3_up(const struct tb_port *port)
{
	return port && port->config.type == TB_TYPE_USB3_UP;
}

static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
			     enum tb_cfg_space space, u32 offset, u32 length)
{
	if (sw->is_unplugged)
		return -ENODEV;
	return tb_cfg_read(sw->tb->ctl,
			   buffer,
			   tb_route(sw),
			   0,
			   space,
			   offset,
			   length);
}

static inline int tb_sw_write(struct tb_switch *sw, const void *buffer,
			      enum tb_cfg_space space, u32 offset, u32 length)
{
	if (sw->is_unplugged)
		return -ENODEV;
	return tb_cfg_write(sw->tb->ctl,
			    buffer,
			    tb_route(sw),
			    0,
			    space,
			    offset,
			    length);
}

static inline int tb_port_read(struct tb_port *port, void *buffer,
			       enum tb_cfg_space space, u32 offset, u32 length)
{
	if (port->sw->is_unplugged)
		return -ENODEV;
	return tb_cfg_read(port->sw->tb->ctl,
			   buffer,
			   tb_route(port->sw),
			   port->port,
			   space,
			   offset,
			   length);
}

static inline int tb_port_write(struct tb_port *port, const void *buffer,
				enum tb_cfg_space space, u32 offset, u32 length)
{
	if (port->sw->is_unplugged)
		return -ENODEV;
	return tb_cfg_write(port->sw->tb->ctl,
			    buffer,
			    tb_route(port->sw),
			    port->port,
			    space,
			    offset,
			    length);
}

#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg)

#define __TB_SW_PRINT(level, sw, fmt, arg...)           \
	do {                                            \
		const struct tb_switch *__sw = (sw);    \
		level(__sw->tb, "%llx: " fmt,           \
		      tb_route(__sw), ## arg);          \
	} while (0)
#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
#define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg)

#define __TB_PORT_PRINT(level, _port, fmt, arg...)                      \
	do {                                                            \
		const struct tb_port *__port = (_port);                 \
		level(__port->sw->tb, "%llx:%x: " fmt,                  \
		      tb_route(__port->sw), __port->port, ## arg);      \
	} while (0)
#define tb_port_WARN(port, fmt, arg...) \
	__TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
#define tb_port_warn(port, fmt, arg...) \
	__TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
#define tb_port_info(port, fmt, arg...) \
	__TB_PORT_PRINT(tb_info, port, fmt, ##arg)
#define tb_port_dbg(port, fmt, arg...) \
	__TB_PORT_PRINT(tb_dbg, port, fmt, ##arg)

struct tb *icm_probe(struct tb_nhi *nhi);
struct tb *tb_probe(struct tb_nhi *nhi);

extern struct device_type tb_domain_type;
extern struct device_type tb_retimer_type;
extern struct device_type tb_switch_type;

int tb_domain_init(void);
void tb_domain_exit(void);
int tb_xdomain_init(void);
void tb_xdomain_exit(void);

struct tb *tb_domain_alloc(struct tb_nhi *nhi, size_t privsize);
int tb_domain_add(struct tb *tb);
void tb_domain_remove(struct tb *tb);
int tb_domain_suspend_noirq(struct tb *tb);
int tb_domain_resume_noirq(struct tb *tb);
int tb_domain_suspend(struct tb *tb);
int tb_domain_freeze_noirq(struct tb *tb);
int tb_domain_thaw_noirq(struct tb *tb);
void tb_domain_complete(struct tb *tb);
int tb_domain_runtime_suspend(struct tb *tb);
int tb_domain_runtime_resume(struct tb *tb);
int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw);
int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw);
int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw);
int tb_domain_disconnect_pcie_paths(struct tb *tb);
int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd);
int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd);
int tb_domain_disconnect_all_paths(struct tb *tb);

static inline struct tb *tb_domain_get(struct tb *tb)
{
	if (tb)
		get_device(&tb->dev);
	return tb;
}

static inline void tb_domain_put(struct tb *tb)
{
	put_device(&tb->dev);
}

struct tb_nvm *tb_nvm_alloc(struct device *dev);
int tb_nvm_add_active(struct tb_nvm *nvm, size_t size, nvmem_reg_read_t reg_read);
int tb_nvm_write_buf(struct tb_nvm *nvm, unsigned int offset, void *val,
		     size_t bytes);
int tb_nvm_add_non_active(struct tb_nvm *nvm, size_t size,
			  nvmem_reg_write_t reg_write);
void tb_nvm_free(struct tb_nvm *nvm);
void tb_nvm_exit(void);

struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
				  u64 route);
struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
			struct device *parent, u64 route);
int tb_switch_configure(struct tb_switch *sw);
int tb_switch_add(struct tb_switch *sw);
void tb_switch_remove(struct tb_switch *sw);
void tb_switch_suspend(struct tb_switch *sw, bool runtime);
int tb_switch_resume(struct tb_switch *sw);
int tb_switch_reset(struct tb_switch *sw);
void tb_sw_set_unplugged(struct tb_switch *sw);
struct tb_port *tb_switch_find_port(struct tb_switch *sw,
				    enum tb_port_type type);
struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,
					       u8 depth);
struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid);
struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route);

/**
 * tb_switch_for_each_port() - Iterate over each switch port
 * @sw: Switch whose ports to iterate
 * @p: Port used as iterator
 *
 * Iterates over each switch port skipping the control port (port %0).
 */
#define tb_switch_for_each_port(sw, p)					\
	for ((p) = &(sw)->ports[1];					\
	     (p) <= &(sw)->ports[(sw)->config.max_port_number]; (p)++)

static inline struct tb_switch *tb_switch_get(struct tb_switch *sw)
{
	if (sw)
		get_device(&sw->dev);
	return sw;
}

static inline void tb_switch_put(struct tb_switch *sw)
{
	put_device(&sw->dev);
}

static inline bool tb_is_switch(const struct device *dev)
{
	return dev->type == &tb_switch_type;
}

static inline struct tb_switch *tb_to_switch(struct device *dev)
{
	if (tb_is_switch(dev))
		return container_of(dev, struct tb_switch, dev);
	return NULL;
}

static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw)
{
	return tb_to_switch(sw->dev.parent);
}

static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
{
	return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&
	       sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE;
}

static inline bool tb_switch_is_eagle_ridge(const struct tb_switch *sw)
{
	return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&
	       sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE;
}

static inline bool tb_switch_is_cactus_ridge(const struct tb_switch *sw)
{
	if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
		switch (sw->config.device_id) {
		case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
		case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
			return true;
		}
	}
	return false;
}

static inline bool tb_switch_is_falcon_ridge(const struct tb_switch *sw)
{
	if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
		switch (sw->config.device_id) {
		case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
		case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
			return true;
		}
	}
	return false;
}

static inline bool tb_switch_is_alpine_ridge(const struct tb_switch *sw)
{
	if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
		switch (sw->config.device_id) {
		case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
		case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
		case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
		case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
			return true;
		}
	}
	return false;
}

static inline bool tb_switch_is_titan_ridge(const struct tb_switch *sw)
{
	if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
		switch (sw->config.device_id) {
		case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
		case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
		case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
			return true;
		}
	}
	return false;
}

static inline bool tb_switch_is_ice_lake(const struct tb_switch *sw)
{
	if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
		switch (sw->config.device_id) {
		case PCI_DEVICE_ID_INTEL_ICL_NHI0:
		case PCI_DEVICE_ID_INTEL_ICL_NHI1:
			return true;
		}
	}
	return false;
}

static inline bool tb_switch_is_tiger_lake(const struct tb_switch *sw)
{
	if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
		switch (sw->config.device_id) {
		case PCI_DEVICE_ID_INTEL_TGL_NHI0:
		case PCI_DEVICE_ID_INTEL_TGL_NHI1:
			return true;
		}
	}
	return false;
}

/**
 * tb_switch_is_usb4() - Is the switch USB4 compliant
 * @sw: Switch to check
 *
 * Returns true if the @sw is USB4 compliant router, false otherwise.
 */
static inline bool tb_switch_is_usb4(const struct tb_switch *sw)
{
	return sw->config.thunderbolt_version == USB4_VERSION_1_0;
}

/**
 * tb_switch_is_icm() - Is the switch handled by ICM firmware
 * @sw: Switch to check
 *
 * In case there is a need to differentiate whether ICM firmware or SW CM
 * is handling @sw this function can be called. It is valid to call this
 * after tb_switch_alloc() and tb_switch_configure() has been called
 * (latter only for SW CM case).
 */
static inline bool tb_switch_is_icm(const struct tb_switch *sw)
{
	return !sw->config.enabled;
}

int tb_switch_lane_bonding_enable(struct tb_switch *sw);
void tb_switch_lane_bonding_disable(struct tb_switch *sw);
int tb_switch_configure_link(struct tb_switch *sw);
void tb_switch_unconfigure_link(struct tb_switch *sw);

bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);

int tb_switch_tmu_init(struct tb_switch *sw);
int tb_switch_tmu_post_time(struct tb_switch *sw);
int tb_switch_tmu_disable(struct tb_switch *sw);
int tb_switch_tmu_enable(struct tb_switch *sw);

static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw)
{
	return sw->tmu.rate == TB_SWITCH_TMU_RATE_HIFI &&
	       !sw->tmu.unidirectional;
}

int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
int tb_port_add_nfc_credits(struct tb_port *port, int credits);
int tb_port_set_initial_credits(struct tb_port *port, u32 credits);
int tb_port_clear_counter(struct tb_port *port, int counter);
int tb_port_unlock(struct tb_port *port);
int tb_port_enable(struct tb_port *port);
int tb_port_disable(struct tb_port *port);
int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid);
void tb_port_release_in_hopid(struct tb_port *port, int hopid);
int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid);
void tb_port_release_out_hopid(struct tb_port *port, int hopid);
struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
				     struct tb_port *prev);

/**
 * tb_for_each_port_on_path() - Iterate over each port on path
 * @src: Source port
 * @dst: Destination port
 * @p: Port used as iterator
 *
 * Walks over each port on path from @src to @dst.
 */
#define tb_for_each_port_on_path(src, dst, p)				\
	for ((p) = tb_next_port_on_path((src), (dst), NULL); (p);	\
	     (p) = tb_next_port_on_path((src), (dst), (p)))

int tb_port_get_link_speed(struct tb_port *port);

int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
int tb_switch_next_cap(struct tb_switch *sw, unsigned int offset);
int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
int tb_port_next_cap(struct tb_port *port, unsigned int offset);
bool tb_port_is_enabled(struct tb_port *port);

bool tb_usb3_port_is_enabled(struct tb_port *port);
int tb_usb3_port_enable(struct tb_port *port, bool enable);

bool tb_pci_port_is_enabled(struct tb_port *port);
int tb_pci_port_enable(struct tb_port *port, bool enable);

int tb_dp_port_hpd_is_active(struct tb_port *port);
int tb_dp_port_hpd_clear(struct tb_port *port);
int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
			unsigned int aux_tx, unsigned int aux_rx);
bool tb_dp_port_is_enabled(struct tb_port *port);
int tb_dp_port_enable(struct tb_port *port, bool enable);

struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid,
				 struct tb_port *dst, int dst_hopid,
				 struct tb_port **last, const char *name);
struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid,
			      struct tb_port *dst, int dst_hopid, int link_nr,
			      const char *name);
void tb_path_free(struct tb_path *path);
int tb_path_activate(struct tb_path *path);
void tb_path_deactivate(struct tb_path *path);
bool tb_path_is_invalid(struct tb_path *path);
bool tb_path_port_on_path(const struct tb_path *path,
			  const struct tb_port *port);

int tb_drom_read(struct tb_switch *sw);
int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);

int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid);
int tb_lc_configure_port(struct tb_port *port);
void tb_lc_unconfigure_port(struct tb_port *port);
int tb_lc_configure_xdomain(struct tb_port *port);
void tb_lc_unconfigure_xdomain(struct tb_port *port);
int tb_lc_set_wake(struct tb_switch *sw, unsigned int flags);
int tb_lc_set_sleep(struct tb_switch *sw);
bool tb_lc_lane_bonding_possible(struct tb_switch *sw);
bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in);
int tb_lc_dp_sink_alloc(struct tb_switch *sw, struct tb_port *in);
int tb_lc_dp_sink_dealloc(struct tb_switch *sw, struct tb_port *in);
int tb_lc_force_power(struct tb_switch *sw);

static inline int tb_route_length(u64 route)
{
	return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
}

/**
 * tb_downstream_route() - get route to downstream switch
 *
 * Port must not be the upstream port (otherwise a loop is created).
 *
 * Return: Returns a route to the switch behind @port.
 */
static inline u64 tb_downstream_route(struct tb_port *port)
{
	return tb_route(port->sw)
	       | ((u64) port->port << (port->sw->config.depth * 8));
}

bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type,
			       const void *buf, size_t size);
struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent,
				    u64 route, const uuid_t *local_uuid,
				    const uuid_t *remote_uuid);
void tb_xdomain_add(struct tb_xdomain *xd);
void tb_xdomain_remove(struct tb_xdomain *xd);
struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link,
						 u8 depth);

int tb_retimer_scan(struct tb_port *port);
void tb_retimer_remove_all(struct tb_port *port);

static inline bool tb_is_retimer(const struct device *dev)
{
	return dev->type == &tb_retimer_type;
}

static inline struct tb_retimer *tb_to_retimer(struct device *dev)
{
	if (tb_is_retimer(dev))
		return container_of(dev, struct tb_retimer, dev);
	return NULL;
}

int usb4_switch_setup(struct tb_switch *sw);
int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid);
int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
			  size_t size);
bool usb4_switch_lane_bonding_possible(struct tb_switch *sw);
int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags);
int usb4_switch_set_sleep(struct tb_switch *sw);
int usb4_switch_nvm_sector_size(struct tb_switch *sw);
int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
			 size_t size);
int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address,
			  const void *buf, size_t size);
int usb4_switch_nvm_authenticate(struct tb_switch *sw);
bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
					  const struct tb_port *port);
struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
					  const struct tb_port *port);

int usb4_port_unlock(struct tb_port *port);
int usb4_port_configure(struct tb_port *port);
void usb4_port_unconfigure(struct tb_port *port);
int usb4_port_configure_xdomain(struct tb_port *port);
void usb4_port_unconfigure_xdomain(struct tb_port *port);
int usb4_port_enumerate_retimers(struct tb_port *port);

int usb4_port_retimer_read(struct tb_port *port, u8 index, u8 reg, void *buf,
			   u8 size);
int usb4_port_retimer_write(struct tb_port *port, u8 index, u8 reg,
			    const void *buf, u8 size);
int usb4_port_retimer_is_last(struct tb_port *port, u8 index);
int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index);
int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index,
				unsigned int address, const void *buf,
				size_t size);
int usb4_port_retimer_nvm_authenticate(struct tb_port *port, u8 index);
int usb4_port_retimer_nvm_authenticate_status(struct tb_port *port, u8 index,
					      u32 *status);
int usb4_port_retimer_nvm_read(struct tb_port *port, u8 index,
			       unsigned int address, void *buf, size_t size);

int usb4_usb3_port_max_link_rate(struct tb_port *port);
int usb4_usb3_port_actual_link_rate(struct tb_port *port);
int usb4_usb3_port_allocated_bandwidth(struct tb_port *port, int *upstream_bw,
				       int *downstream_bw);
int usb4_usb3_port_allocate_bandwidth(struct tb_port *port, int *upstream_bw,
				      int *downstream_bw);
int usb4_usb3_port_release_bandwidth(struct tb_port *port, int *upstream_bw,
				     int *downstream_bw);

/* Keep link controller awake during update */
#define QUIRK_FORCE_POWER_LINK_CONTROLLER		BIT(0)

void tb_check_quirks(struct tb_switch *sw);

#ifdef CONFIG_ACPI
void tb_acpi_add_links(struct tb_nhi *nhi);
#else
static inline void tb_acpi_add_links(struct tb_nhi *nhi) { }
#endif

#ifdef CONFIG_DEBUG_FS
void tb_debugfs_init(void);
void tb_debugfs_exit(void);
void tb_switch_debugfs_init(struct tb_switch *sw);
void tb_switch_debugfs_remove(struct tb_switch *sw);
#else
static inline void tb_debugfs_init(void) { }
static inline void tb_debugfs_exit(void) { }
static inline void tb_switch_debugfs_init(struct tb_switch *sw) { }
static inline void tb_switch_debugfs_remove(struct tb_switch *sw) { }
#endif

#ifdef CONFIG_USB4_KUNIT_TEST
int tb_test_init(void);
void tb_test_exit(void);
#else
static inline int tb_test_init(void) { return 0; }
static inline void tb_test_exit(void) { }
#endif

#endif