1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Thunderbolt driver - bus logic (NHI independent)
4 *
5 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
6 * Copyright (C) 2018, Intel Corporation
7 */
8
9#ifndef TB_H_
10#define TB_H_
11
12#include <linux/debugfs.h>
13#include <linux/nvmem-provider.h>
14#include <linux/pci.h>
15#include <linux/thunderbolt.h>
16#include <linux/uuid.h>
17#include <linux/bitfield.h>
18
19#include "tb_regs.h"
20#include "ctl.h"
21#include "dma_port.h"
22
23/* Keep link controller awake during update */
24#define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0)
25/* Disable CLx if not supported */
26#define QUIRK_NO_CLX BIT(1)
27/* Need to keep power on while USB4 port is in redrive mode */
28#define QUIRK_KEEP_POWER_IN_DP_REDRIVE BIT(2)
29
30/**
31 * struct tb_nvm - Structure holding NVM information
32 * @dev: Owner of the NVM
33 * @major: Major version number of the active NVM portion
34 * @minor: Minor version number of the active NVM portion
35 * @id: Identifier used with both NVM portions
36 * @active: Active portion NVMem device
37 * @active_size: Size in bytes of the active NVM
38 * @non_active: Non-active portion NVMem device
39 * @buf: Buffer where the NVM image is stored before it is written to
40 * the actual NVM flash device
41 * @buf_data_start: Where the actual image starts after skipping
42 * possible headers
43 * @buf_data_size: Number of bytes actually consumed by the new NVM
44 * image
45 * @authenticating: The device is authenticating the new NVM
46 * @flushed: The image has been flushed to the storage area
47 * @vops: Router vendor specific NVM operations (optional)
48 *
49 * The user of this structure needs to handle serialization of possible
50 * concurrent access.
51 */
52struct tb_nvm {
53 struct device *dev;
54 u32 major;
55 u32 minor;
56 int id;
57 struct nvmem_device *active;
58 size_t active_size;
59 struct nvmem_device *non_active;
60 void *buf;
61 void *buf_data_start;
62 size_t buf_data_size;
63 bool authenticating;
64 bool flushed;
65 const struct tb_nvm_vendor_ops *vops;
66};
67
68enum tb_nvm_write_ops {
69 WRITE_AND_AUTHENTICATE = 1,
70 WRITE_ONLY = 2,
71 AUTHENTICATE_ONLY = 3,
72};
73
74#define TB_SWITCH_KEY_SIZE 32
75#define TB_SWITCH_MAX_DEPTH 6
76#define USB4_SWITCH_MAX_DEPTH 5
77
78/**
79 * enum tb_switch_tmu_mode - TMU mode
80 * @TB_SWITCH_TMU_MODE_OFF: TMU is off
81 * @TB_SWITCH_TMU_MODE_LOWRES: Uni-directional, normal mode
82 * @TB_SWITCH_TMU_MODE_HIFI_UNI: Uni-directional, HiFi mode
83 * @TB_SWITCH_TMU_MODE_HIFI_BI: Bi-directional, HiFi mode
84 * @TB_SWITCH_TMU_MODE_MEDRES_ENHANCED_UNI: Enhanced Uni-directional, MedRes mode
85 *
86 * Ordering is based on TMU accuracy level (highest last).
87 */
88enum tb_switch_tmu_mode {
89 TB_SWITCH_TMU_MODE_OFF,
90 TB_SWITCH_TMU_MODE_LOWRES,
91 TB_SWITCH_TMU_MODE_HIFI_UNI,
92 TB_SWITCH_TMU_MODE_HIFI_BI,
93 TB_SWITCH_TMU_MODE_MEDRES_ENHANCED_UNI,
94};
95
96/**
97 * struct tb_switch_tmu - Structure holding router TMU configuration
98 * @cap: Offset to the TMU capability (%0 if not found)
99 * @has_ucap: Does the switch support uni-directional mode
100 * @mode: TMU mode related to the upstream router. Reflects the HW
101 * setting. Don't care for host router.
102 * @mode_request: TMU mode requested to set. Related to upstream router.
103 * Don't care for host router.
104 */
105struct tb_switch_tmu {
106 int cap;
107 bool has_ucap;
108 enum tb_switch_tmu_mode mode;
109 enum tb_switch_tmu_mode mode_request;
110};
111
112/**
113 * struct tb_switch - a thunderbolt switch
114 * @dev: Device for the switch
115 * @config: Switch configuration
116 * @ports: Ports in this switch
117 * @dma_port: If the switch has port supporting DMA configuration based
118 * mailbox this will hold the pointer to that (%NULL
119 * otherwise). If set it also means the switch has
120 * upgradeable NVM.
121 * @tmu: The switch TMU configuration
122 * @tb: Pointer to the domain the switch belongs to
123 * @uid: Unique ID of the switch
124 * @uuid: UUID of the switch (or %NULL if not supported)
125 * @vendor: Vendor ID of the switch
126 * @device: Device ID of the switch
127 * @vendor_name: Name of the vendor (or %NULL if not known)
128 * @device_name: Name of the device (or %NULL if not known)
129 * @link_speed: Speed of the link in Gb/s
130 * @link_width: Width of the upstream facing link
131 * @preferred_link_width: Router preferred link width (only set for Gen 4 links)
132 * @link_usb4: Upstream link is USB4
133 * @generation: Switch Thunderbolt generation
134 * @cap_plug_events: Offset to the plug events capability (%0 if not found)
135 * @cap_vsec_tmu: Offset to the TMU vendor specific capability (%0 if not found)
136 * @cap_lc: Offset to the link controller capability (%0 if not found)
137 * @cap_lp: Offset to the low power (CLx for TBT) capability (%0 if not found)
138 * @is_unplugged: The switch is going away
139 * @drom: DROM of the switch (%NULL if not found)
140 * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise)
141 * @no_nvm_upgrade: Prevent NVM upgrade of this switch
142 * @safe_mode: The switch is in safe-mode
143 * @boot: Whether the switch was already authorized on boot or not
144 * @rpm: The switch supports runtime PM
145 * @authorized: Whether the switch is authorized by user or policy
146 * @security_level: Switch supported security level
147 * @debugfs_dir: Pointer to the debugfs structure
148 * @key: Contains the key used to challenge the device or %NULL if not
149 * supported. Size of the key is %TB_SWITCH_KEY_SIZE.
150 * @connection_id: Connection ID used with ICM messaging
151 * @connection_key: Connection key used with ICM messaging
152 * @link: Root switch link this switch is connected (ICM only)
153 * @depth: Depth in the chain this switch is connected (ICM only)
154 * @rpm_complete: Completion used to wait for runtime resume to
155 * complete (ICM only)
156 * @quirks: Quirks used for this Thunderbolt switch
157 * @credit_allocation: Are the below buffer allocation parameters valid
158 * @max_usb3_credits: Router preferred number of buffers for USB 3.x
159 * @min_dp_aux_credits: Router preferred minimum number of buffers for DP AUX
160 * @min_dp_main_credits: Router preferred minimum number of buffers for DP MAIN
161 * @max_pcie_credits: Router preferred number of buffers for PCIe
162 * @max_dma_credits: Router preferred number of buffers for DMA/P2P
163 * @clx: CLx states on the upstream link of the router
164 * @drom_blob: DROM debugfs blob wrapper
165 *
166 * When the switch is being added or removed to the domain (other
167 * switches) you need to have domain lock held.
168 *
169 * In USB4 terminology this structure represents a router.
170 */
171struct tb_switch {
172 struct device dev;
173 struct tb_regs_switch_header config;
174 struct tb_port *ports;
175 struct tb_dma_port *dma_port;
176 struct tb_switch_tmu tmu;
177 struct tb *tb;
178 u64 uid;
179 uuid_t *uuid;
180 u16 vendor;
181 u16 device;
182 const char *vendor_name;
183 const char *device_name;
184 unsigned int link_speed;
185 enum tb_link_width link_width;
186 enum tb_link_width preferred_link_width;
187 bool link_usb4;
188 unsigned int generation;
189 int cap_plug_events;
190 int cap_vsec_tmu;
191 int cap_lc;
192 int cap_lp;
193 bool is_unplugged;
194 u8 *drom;
195 struct tb_nvm *nvm;
196 bool no_nvm_upgrade;
197 bool safe_mode;
198 bool boot;
199 bool rpm;
200 unsigned int authorized;
201 enum tb_security_level security_level;
202 struct dentry *debugfs_dir;
203 u8 *key;
204 u8 connection_id;
205 u8 connection_key;
206 u8 link;
207 u8 depth;
208 struct completion rpm_complete;
209 unsigned long quirks;
210 bool credit_allocation;
211 unsigned int max_usb3_credits;
212 unsigned int min_dp_aux_credits;
213 unsigned int min_dp_main_credits;
214 unsigned int max_pcie_credits;
215 unsigned int max_dma_credits;
216 unsigned int clx;
217#ifdef CONFIG_DEBUG_FS
218 struct debugfs_blob_wrapper drom_blob;
219#endif
220};
221
222/**
223 * struct tb_bandwidth_group - Bandwidth management group
224 * @tb: Pointer to the domain the group belongs to
225 * @index: Index of the group (aka Group_ID). Valid values %1-%7
226 * @ports: DP IN adapters belonging to this group are linked here
227 * @reserved: Bandwidth released by one tunnel in the group, available
228 * to others. This is reported as part of estimated_bw for
229 * the group.
230 * @release_work: Worker to release the @reserved if it is not used by
231 * any of the tunnels.
232 *
233 * Any tunnel that requires isochronous bandwidth (that's DP for now) is
234 * attached to a bandwidth group. All tunnels going through the same
235 * USB4 links share the same group and can dynamically distribute the
236 * bandwidth within the group.
237 */
238struct tb_bandwidth_group {
239 struct tb *tb;
240 int index;
241 struct list_head ports;
242 int reserved;
243 struct delayed_work release_work;
244};
245
246/**
247 * struct tb_port - a thunderbolt port, part of a tb_switch
248 * @config: Cached port configuration read from registers
249 * @sw: Switch the port belongs to
250 * @remote: Remote port (%NULL if not connected)
251 * @xdomain: Remote host (%NULL if not connected)
252 * @cap_phy: Offset, zero if not found
253 * @cap_tmu: Offset of the adapter specific TMU capability (%0 if not present)
254 * @cap_adap: Offset of the adapter specific capability (%0 if not present)
255 * @cap_usb4: Offset to the USB4 port capability (%0 if not present)
256 * @usb4: Pointer to the USB4 port structure (only if @cap_usb4 is != %0)
257 * @port: Port number on switch
258 * @disabled: Disabled by eeprom or enabled but not implemented
259 * @bonded: true if the port is bonded (two lanes combined as one)
260 * @dual_link_port: If the switch is connected using two ports, points
261 * to the other port.
262 * @link_nr: Is this primary or secondary port on the dual_link.
263 * @in_hopids: Currently allocated input HopIDs
264 * @out_hopids: Currently allocated output HopIDs
265 * @list: Used to link ports to DP resources list
266 * @total_credits: Total number of buffers available for this port
267 * @ctl_credits: Buffers reserved for control path
268 * @dma_credits: Number of credits allocated for DMA tunneling for all
269 * DMA paths through this port.
270 * @group: Bandwidth allocation group the adapter is assigned to. Only
271 * used for DP IN adapters for now.
272 * @group_list: The adapter is linked to the group's list of ports through this
273 * @max_bw: Maximum possible bandwidth through this adapter if set to
274 * non-zero.
275 * @redrive: For DP IN, if true the adapter is in redrive mode.
276 *
277 * In USB4 terminology this structure represents an adapter (protocol or
278 * lane adapter).
279 */
280struct tb_port {
281 struct tb_regs_port_header config;
282 struct tb_switch *sw;
283 struct tb_port *remote;
284 struct tb_xdomain *xdomain;
285 int cap_phy;
286 int cap_tmu;
287 int cap_adap;
288 int cap_usb4;
289 struct usb4_port *usb4;
290 u8 port;
291 bool disabled;
292 bool bonded;
293 struct tb_port *dual_link_port;
294 u8 link_nr:1;
295 struct ida in_hopids;
296 struct ida out_hopids;
297 struct list_head list;
298 unsigned int total_credits;
299 unsigned int ctl_credits;
300 unsigned int dma_credits;
301 struct tb_bandwidth_group *group;
302 struct list_head group_list;
303 unsigned int max_bw;
304 bool redrive;
305};
306
307/**
308 * struct usb4_port - USB4 port device
309 * @dev: Device for the port
310 * @port: Pointer to the lane 0 adapter
311 * @can_offline: Does the port have necessary platform support to moved
312 * it into offline mode and back
313 * @offline: The port is currently in offline mode
314 * @margining: Pointer to margining structure if enabled
315 */
316struct usb4_port {
317 struct device dev;
318 struct tb_port *port;
319 bool can_offline;
320 bool offline;
321#ifdef CONFIG_USB4_DEBUGFS_MARGINING
322 struct tb_margining *margining;
323#endif
324};
325
326/**
327 * tb_retimer: Thunderbolt retimer
328 * @dev: Device for the retimer
329 * @tb: Pointer to the domain the retimer belongs to
330 * @index: Retimer index facing the router USB4 port
331 * @vendor: Vendor ID of the retimer
332 * @device: Device ID of the retimer
333 * @port: Pointer to the lane 0 adapter
334 * @nvm: Pointer to the NVM if the retimer has one (%NULL otherwise)
335 * @no_nvm_upgrade: Prevent NVM upgrade of this retimer
336 * @auth_status: Status of last NVM authentication
337 * @margining: Pointer to margining structure if enabled
338 */
339struct tb_retimer {
340 struct device dev;
341 struct tb *tb;
342 u8 index;
343 u32 vendor;
344 u32 device;
345 struct tb_port *port;
346 struct tb_nvm *nvm;
347 bool no_nvm_upgrade;
348 u32 auth_status;
349#ifdef CONFIG_USB4_DEBUGFS_MARGINING
350 struct tb_margining *margining;
351#endif
352};
353
354/**
355 * struct tb_path_hop - routing information for a tb_path
356 * @in_port: Ingress port of a switch
357 * @out_port: Egress port of a switch where the packet is routed out
358 * (must be on the same switch than @in_port)
359 * @in_hop_index: HopID where the path configuration entry is placed in
360 * the path config space of @in_port.
361 * @in_counter_index: Used counter index (not used in the driver
362 * currently, %-1 to disable)
363 * @next_hop_index: HopID of the packet when it is routed out from @out_port
364 * @initial_credits: Number of initial flow control credits allocated for
365 * the path
366 * @nfc_credits: Number of non-flow controlled buffers allocated for the
367 * @in_port.
368 * @pm_support: Set path PM packet support bit to 1 (for USB4 v2 routers)
369 *
370 * Hop configuration is always done on the IN port of a switch.
371 * in_port and out_port have to be on the same switch. Packets arriving on
372 * in_port with "hop" = in_hop_index will get routed to through out_port. The
373 * next hop to take (on out_port->remote) is determined by
374 * next_hop_index. When routing packet to another switch (out->remote is
375 * set) the @next_hop_index must match the @in_hop_index of that next
376 * hop to make routing possible.
377 *
378 * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
379 * port.
380 */
381struct tb_path_hop {
382 struct tb_port *in_port;
383 struct tb_port *out_port;
384 int in_hop_index;
385 int in_counter_index;
386 int next_hop_index;
387 unsigned int initial_credits;
388 unsigned int nfc_credits;
389 bool pm_support;
390};
391
392/**
393 * enum tb_path_port - path options mask
394 * @TB_PATH_NONE: Do not activate on any hop on path
395 * @TB_PATH_SOURCE: Activate on the first hop (out of src)
396 * @TB_PATH_INTERNAL: Activate on the intermediate hops (not the first/last)
397 * @TB_PATH_DESTINATION: Activate on the last hop (into dst)
398 * @TB_PATH_ALL: Activate on all hops on the path
399 */
400enum tb_path_port {
401 TB_PATH_NONE = 0,
402 TB_PATH_SOURCE = 1,
403 TB_PATH_INTERNAL = 2,
404 TB_PATH_DESTINATION = 4,
405 TB_PATH_ALL = 7,
406};
407
408/**
409 * struct tb_path - a unidirectional path between two ports
410 * @tb: Pointer to the domain structure
411 * @name: Name of the path (used for debugging)
412 * @ingress_shared_buffer: Shared buffering used for ingress ports on the path
413 * @egress_shared_buffer: Shared buffering used for egress ports on the path
414 * @ingress_fc_enable: Flow control for ingress ports on the path
415 * @egress_fc_enable: Flow control for egress ports on the path
416 * @priority: Priority group if the path
417 * @weight: Weight of the path inside the priority group
418 * @drop_packages: Drop packages from queue tail or head
419 * @activated: Is the path active
420 * @clear_fc: Clear all flow control from the path config space entries
421 * when deactivating this path
422 * @hops: Path hops
423 * @path_length: How many hops the path uses
424 * @alloc_hopid: Does this path consume port HopID
425 *
426 * A path consists of a number of hops (see &struct tb_path_hop). To
427 * establish a PCIe tunnel two paths have to be created between the two
428 * PCIe ports.
429 */
430struct tb_path {
431 struct tb *tb;
432 const char *name;
433 enum tb_path_port ingress_shared_buffer;
434 enum tb_path_port egress_shared_buffer;
435 enum tb_path_port ingress_fc_enable;
436 enum tb_path_port egress_fc_enable;
437
438 unsigned int priority:3;
439 int weight:4;
440 bool drop_packages;
441 bool activated;
442 bool clear_fc;
443 struct tb_path_hop *hops;
444 int path_length;
445 bool alloc_hopid;
446};
447
448/* HopIDs 0-7 are reserved by the Thunderbolt protocol */
449#define TB_PATH_MIN_HOPID 8
450/*
451 * Support paths from the farthest (depth 6) router to the host and back
452 * to the same level (not necessarily to the same router).
453 */
454#define TB_PATH_MAX_HOPS (7 * 2)
455
456/* Possible wake types */
457#define TB_WAKE_ON_CONNECT BIT(0)
458#define TB_WAKE_ON_DISCONNECT BIT(1)
459#define TB_WAKE_ON_USB4 BIT(2)
460#define TB_WAKE_ON_USB3 BIT(3)
461#define TB_WAKE_ON_PCIE BIT(4)
462#define TB_WAKE_ON_DP BIT(5)
463
464/* CL states */
465#define TB_CL0S BIT(0)
466#define TB_CL1 BIT(1)
467#define TB_CL2 BIT(2)
468
469/**
470 * struct tb_cm_ops - Connection manager specific operations vector
471 * @driver_ready: Called right after control channel is started. Used by
472 * ICM to send driver ready message to the firmware.
473 * @start: Starts the domain
474 * @stop: Stops the domain
475 * @deinit: Perform any cleanup after the domain is stopped but before
476 * it is unregistered. Called without @tb->lock taken. Optional.
477 * @suspend_noirq: Connection manager specific suspend_noirq
478 * @resume_noirq: Connection manager specific resume_noirq
479 * @suspend: Connection manager specific suspend
480 * @freeze_noirq: Connection manager specific freeze_noirq
481 * @thaw_noirq: Connection manager specific thaw_noirq
482 * @complete: Connection manager specific complete
483 * @runtime_suspend: Connection manager specific runtime_suspend
484 * @runtime_resume: Connection manager specific runtime_resume
485 * @runtime_suspend_switch: Runtime suspend a switch
486 * @runtime_resume_switch: Runtime resume a switch
487 * @handle_event: Handle thunderbolt event
488 * @get_boot_acl: Get boot ACL list
489 * @set_boot_acl: Set boot ACL list
490 * @disapprove_switch: Disapprove switch (disconnect PCIe tunnel)
491 * @approve_switch: Approve switch
492 * @add_switch_key: Add key to switch
493 * @challenge_switch_key: Challenge switch using key
494 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
495 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths
496 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths
497 * @usb4_switch_op: Optional proxy for USB4 router operations. If set
498 * this will be called whenever USB4 router operation is
499 * performed. If this returns %-EOPNOTSUPP then the
500 * native USB4 router operation is called.
501 * @usb4_switch_nvm_authenticate_status: Optional callback that the CM
502 * implementation can be used to
503 * return status of USB4 NVM_AUTH
504 * router operation.
505 */
506struct tb_cm_ops {
507 int (*driver_ready)(struct tb *tb);
508 int (*start)(struct tb *tb, bool reset);
509 void (*stop)(struct tb *tb);
510 void (*deinit)(struct tb *tb);
511 int (*suspend_noirq)(struct tb *tb);
512 int (*resume_noirq)(struct tb *tb);
513 int (*suspend)(struct tb *tb);
514 int (*freeze_noirq)(struct tb *tb);
515 int (*thaw_noirq)(struct tb *tb);
516 void (*complete)(struct tb *tb);
517 int (*runtime_suspend)(struct tb *tb);
518 int (*runtime_resume)(struct tb *tb);
519 int (*runtime_suspend_switch)(struct tb_switch *sw);
520 int (*runtime_resume_switch)(struct tb_switch *sw);
521 void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type,
522 const void *buf, size_t size);
523 int (*get_boot_acl)(struct tb *tb, uuid_t *uuids, size_t nuuids);
524 int (*set_boot_acl)(struct tb *tb, const uuid_t *uuids, size_t nuuids);
525 int (*disapprove_switch)(struct tb *tb, struct tb_switch *sw);
526 int (*approve_switch)(struct tb *tb, struct tb_switch *sw);
527 int (*add_switch_key)(struct tb *tb, struct tb_switch *sw);
528 int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw,
529 const u8 *challenge, u8 *response);
530 int (*disconnect_pcie_paths)(struct tb *tb);
531 int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd,
532 int transmit_path, int transmit_ring,
533 int receive_path, int receive_ring);
534 int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd,
535 int transmit_path, int transmit_ring,
536 int receive_path, int receive_ring);
537 int (*usb4_switch_op)(struct tb_switch *sw, u16 opcode, u32 *metadata,
538 u8 *status, const void *tx_data, size_t tx_data_len,
539 void *rx_data, size_t rx_data_len);
540 int (*usb4_switch_nvm_authenticate_status)(struct tb_switch *sw,
541 u32 *status);
542};
543
544static inline void *tb_priv(struct tb *tb)
545{
546 return (void *)tb->privdata;
547}
548
549#define TB_AUTOSUSPEND_DELAY 15000 /* ms */
550
551/* helper functions & macros */
552
553/**
554 * tb_upstream_port() - return the upstream port of a switch
555 *
556 * Every switch has an upstream port (for the root switch it is the NHI).
557 *
558 * During switch alloc/init tb_upstream_port()->remote may be NULL, even for
559 * non root switches (on the NHI port remote is always NULL).
560 *
561 * Return: Returns the upstream port of the switch.
562 */
563static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
564{
565 return &sw->ports[sw->config.upstream_port_number];
566}
567
568/**
569 * tb_is_upstream_port() - Is the port upstream facing
570 * @port: Port to check
571 *
572 * Returns true if @port is upstream facing port. In case of dual link
573 * ports both return true.
574 */
575static inline bool tb_is_upstream_port(const struct tb_port *port)
576{
577 const struct tb_port *upstream_port = tb_upstream_port(sw: port->sw);
578 return port == upstream_port || port->dual_link_port == upstream_port;
579}
580
581static inline u64 tb_route(const struct tb_switch *sw)
582{
583 return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
584}
585
586static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
587{
588 u8 port;
589
590 port = route >> (sw->config.depth * 8);
591 if (WARN_ON(port > sw->config.max_port_number))
592 return NULL;
593 return &sw->ports[port];
594}
595
596static inline const char *tb_width_name(enum tb_link_width width)
597{
598 switch (width) {
599 case TB_LINK_WIDTH_SINGLE:
600 return "symmetric, single lane";
601 case TB_LINK_WIDTH_DUAL:
602 return "symmetric, dual lanes";
603 case TB_LINK_WIDTH_ASYM_TX:
604 return "asymmetric, 3 transmitters, 1 receiver";
605 case TB_LINK_WIDTH_ASYM_RX:
606 return "asymmetric, 3 receivers, 1 transmitter";
607 default:
608 return "unknown";
609 }
610}
611
612/**
613 * tb_port_has_remote() - Does the port have switch connected downstream
614 * @port: Port to check
615 *
616 * Returns true only when the port is primary port and has remote set.
617 */
618static inline bool tb_port_has_remote(const struct tb_port *port)
619{
620 if (tb_is_upstream_port(port))
621 return false;
622 if (!port->remote)
623 return false;
624 if (port->dual_link_port && port->link_nr)
625 return false;
626
627 return true;
628}
629
630static inline bool tb_port_is_null(const struct tb_port *port)
631{
632 return port && port->port && port->config.type == TB_TYPE_PORT;
633}
634
635static inline bool tb_port_is_nhi(const struct tb_port *port)
636{
637 return port && port->config.type == TB_TYPE_NHI;
638}
639
640static inline bool tb_port_is_pcie_down(const struct tb_port *port)
641{
642 return port && port->config.type == TB_TYPE_PCIE_DOWN;
643}
644
645static inline bool tb_port_is_pcie_up(const struct tb_port *port)
646{
647 return port && port->config.type == TB_TYPE_PCIE_UP;
648}
649
650static inline bool tb_port_is_dpin(const struct tb_port *port)
651{
652 return port && port->config.type == TB_TYPE_DP_HDMI_IN;
653}
654
655static inline bool tb_port_is_dpout(const struct tb_port *port)
656{
657 return port && port->config.type == TB_TYPE_DP_HDMI_OUT;
658}
659
660static inline bool tb_port_is_usb3_down(const struct tb_port *port)
661{
662 return port && port->config.type == TB_TYPE_USB3_DOWN;
663}
664
665static inline bool tb_port_is_usb3_up(const struct tb_port *port)
666{
667 return port && port->config.type == TB_TYPE_USB3_UP;
668}
669
670static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
671 enum tb_cfg_space space, u32 offset, u32 length)
672{
673 if (sw->is_unplugged)
674 return -ENODEV;
675 return tb_cfg_read(ctl: sw->tb->ctl,
676 buffer,
677 route: tb_route(sw),
678 port: 0,
679 space,
680 offset,
681 length);
682}
683
684static inline int tb_sw_write(struct tb_switch *sw, const void *buffer,
685 enum tb_cfg_space space, u32 offset, u32 length)
686{
687 if (sw->is_unplugged)
688 return -ENODEV;
689 return tb_cfg_write(ctl: sw->tb->ctl,
690 buffer,
691 route: tb_route(sw),
692 port: 0,
693 space,
694 offset,
695 length);
696}
697
698static inline int tb_port_read(struct tb_port *port, void *buffer,
699 enum tb_cfg_space space, u32 offset, u32 length)
700{
701 if (port->sw->is_unplugged)
702 return -ENODEV;
703 return tb_cfg_read(ctl: port->sw->tb->ctl,
704 buffer,
705 route: tb_route(sw: port->sw),
706 port: port->port,
707 space,
708 offset,
709 length);
710}
711
712static inline int tb_port_write(struct tb_port *port, const void *buffer,
713 enum tb_cfg_space space, u32 offset, u32 length)
714{
715 if (port->sw->is_unplugged)
716 return -ENODEV;
717 return tb_cfg_write(ctl: port->sw->tb->ctl,
718 buffer,
719 route: tb_route(sw: port->sw),
720 port: port->port,
721 space,
722 offset,
723 length);
724}
725
726#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
727#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
728#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
729#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
730#define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg)
731
732#define __TB_SW_PRINT(level, sw, fmt, arg...) \
733 do { \
734 const struct tb_switch *__sw = (sw); \
735 level(__sw->tb, "%llx: " fmt, \
736 tb_route(__sw), ## arg); \
737 } while (0)
738#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
739#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
740#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
741#define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg)
742
743#define __TB_PORT_PRINT(level, _port, fmt, arg...) \
744 do { \
745 const struct tb_port *__port = (_port); \
746 level(__port->sw->tb, "%llx:%u: " fmt, \
747 tb_route(__port->sw), __port->port, ## arg); \
748 } while (0)
749#define tb_port_WARN(port, fmt, arg...) \
750 __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
751#define tb_port_warn(port, fmt, arg...) \
752 __TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
753#define tb_port_info(port, fmt, arg...) \
754 __TB_PORT_PRINT(tb_info, port, fmt, ##arg)
755#define tb_port_dbg(port, fmt, arg...) \
756 __TB_PORT_PRINT(tb_dbg, port, fmt, ##arg)
757
758struct tb *icm_probe(struct tb_nhi *nhi);
759struct tb *tb_probe(struct tb_nhi *nhi);
760
761extern const struct device_type tb_domain_type;
762extern const struct device_type tb_retimer_type;
763extern const struct device_type tb_switch_type;
764extern const struct device_type usb4_port_device_type;
765
766int tb_domain_init(void);
767void tb_domain_exit(void);
768int tb_xdomain_init(void);
769void tb_xdomain_exit(void);
770
771struct tb *tb_domain_alloc(struct tb_nhi *nhi, int timeout_msec, size_t privsize);
772int tb_domain_add(struct tb *tb, bool reset);
773void tb_domain_remove(struct tb *tb);
774int tb_domain_suspend_noirq(struct tb *tb);
775int tb_domain_resume_noirq(struct tb *tb);
776int tb_domain_suspend(struct tb *tb);
777int tb_domain_freeze_noirq(struct tb *tb);
778int tb_domain_thaw_noirq(struct tb *tb);
779void tb_domain_complete(struct tb *tb);
780int tb_domain_runtime_suspend(struct tb *tb);
781int tb_domain_runtime_resume(struct tb *tb);
782int tb_domain_disapprove_switch(struct tb *tb, struct tb_switch *sw);
783int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw);
784int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw);
785int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw);
786int tb_domain_disconnect_pcie_paths(struct tb *tb);
787int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd,
788 int transmit_path, int transmit_ring,
789 int receive_path, int receive_ring);
790int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd,
791 int transmit_path, int transmit_ring,
792 int receive_path, int receive_ring);
793int tb_domain_disconnect_all_paths(struct tb *tb);
794
795static inline struct tb *tb_domain_get(struct tb *tb)
796{
797 if (tb)
798 get_device(dev: &tb->dev);
799 return tb;
800}
801
802static inline void tb_domain_put(struct tb *tb)
803{
804 put_device(dev: &tb->dev);
805}
806
807/**
808 * tb_domain_event() - Notify userspace about an event in domain
809 * @tb: Domain where event occurred
810 * @envp: Array of uevent environment strings (can be %NULL)
811 *
812 * This function provides a way to notify userspace about any events
813 * that take place in the domain.
814 */
815static inline void tb_domain_event(struct tb *tb, char *envp[])
816{
817 kobject_uevent_env(kobj: &tb->dev.kobj, action: KOBJ_CHANGE, envp);
818}
819
820struct tb_nvm *tb_nvm_alloc(struct device *dev);
821int tb_nvm_read_version(struct tb_nvm *nvm);
822int tb_nvm_validate(struct tb_nvm *nvm);
823int tb_nvm_write_headers(struct tb_nvm *nvm);
824int tb_nvm_add_active(struct tb_nvm *nvm, nvmem_reg_read_t reg_read);
825int tb_nvm_write_buf(struct tb_nvm *nvm, unsigned int offset, void *val,
826 size_t bytes);
827int tb_nvm_add_non_active(struct tb_nvm *nvm, nvmem_reg_write_t reg_write);
828void tb_nvm_free(struct tb_nvm *nvm);
829void tb_nvm_exit(void);
830
831typedef int (*read_block_fn)(void *, unsigned int, void *, size_t);
832typedef int (*write_block_fn)(void *, unsigned int, const void *, size_t);
833
834int tb_nvm_read_data(unsigned int address, void *buf, size_t size,
835 unsigned int retries, read_block_fn read_block,
836 void *read_block_data);
837int tb_nvm_write_data(unsigned int address, const void *buf, size_t size,
838 unsigned int retries, write_block_fn write_next_block,
839 void *write_block_data);
840
841int tb_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
842 size_t size);
843struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
844 u64 route);
845struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
846 struct device *parent, u64 route);
847int tb_switch_configure(struct tb_switch *sw);
848int tb_switch_configuration_valid(struct tb_switch *sw);
849int tb_switch_add(struct tb_switch *sw);
850void tb_switch_remove(struct tb_switch *sw);
851void tb_switch_suspend(struct tb_switch *sw, bool runtime);
852int tb_switch_resume(struct tb_switch *sw, bool runtime);
853int tb_switch_reset(struct tb_switch *sw);
854int tb_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
855 u32 value, int timeout_msec);
856void tb_sw_set_unplugged(struct tb_switch *sw);
857struct tb_port *tb_switch_find_port(struct tb_switch *sw,
858 enum tb_port_type type);
859struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,
860 u8 depth);
861struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid);
862struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route);
863
864/**
865 * tb_switch_for_each_port() - Iterate over each switch port
866 * @sw: Switch whose ports to iterate
867 * @p: Port used as iterator
868 *
869 * Iterates over each switch port skipping the control port (port %0).
870 */
871#define tb_switch_for_each_port(sw, p) \
872 for ((p) = &(sw)->ports[1]; \
873 (p) <= &(sw)->ports[(sw)->config.max_port_number]; (p)++)
874
875static inline struct tb_switch *tb_switch_get(struct tb_switch *sw)
876{
877 if (sw)
878 get_device(dev: &sw->dev);
879 return sw;
880}
881
882static inline void tb_switch_put(struct tb_switch *sw)
883{
884 put_device(dev: &sw->dev);
885}
886
887static inline bool tb_is_switch(const struct device *dev)
888{
889 return dev->type == &tb_switch_type;
890}
891
892static inline struct tb_switch *tb_to_switch(const struct device *dev)
893{
894 if (tb_is_switch(dev))
895 return container_of(dev, struct tb_switch, dev);
896 return NULL;
897}
898
899static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw)
900{
901 return tb_to_switch(dev: sw->dev.parent);
902}
903
904/**
905 * tb_switch_downstream_port() - Return downstream facing port of parent router
906 * @sw: Device router pointer
907 *
908 * Only call for device routers. Returns the downstream facing port of
909 * the parent router.
910 */
911static inline struct tb_port *tb_switch_downstream_port(struct tb_switch *sw)
912{
913 if (WARN_ON(!tb_route(sw)))
914 return NULL;
915 return tb_port_at(route: tb_route(sw), sw: tb_switch_parent(sw));
916}
917
918/**
919 * tb_switch_depth() - Returns depth of the connected router
920 * @sw: Router
921 */
922static inline int tb_switch_depth(const struct tb_switch *sw)
923{
924 return sw->config.depth;
925}
926
927static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
928{
929 return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&
930 sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE;
931}
932
933static inline bool tb_switch_is_eagle_ridge(const struct tb_switch *sw)
934{
935 return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&
936 sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE;
937}
938
939static inline bool tb_switch_is_cactus_ridge(const struct tb_switch *sw)
940{
941 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
942 switch (sw->config.device_id) {
943 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
944 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
945 return true;
946 }
947 }
948 return false;
949}
950
951static inline bool tb_switch_is_falcon_ridge(const struct tb_switch *sw)
952{
953 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
954 switch (sw->config.device_id) {
955 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
956 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
957 return true;
958 }
959 }
960 return false;
961}
962
963static inline bool tb_switch_is_alpine_ridge(const struct tb_switch *sw)
964{
965 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
966 switch (sw->config.device_id) {
967 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
968 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_4C_BRIDGE:
969 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
970 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
971 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
972 return true;
973 }
974 }
975 return false;
976}
977
978static inline bool tb_switch_is_titan_ridge(const struct tb_switch *sw)
979{
980 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
981 switch (sw->config.device_id) {
982 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
983 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
984 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
985 return true;
986 }
987 }
988 return false;
989}
990
991static inline bool tb_switch_is_tiger_lake(const struct tb_switch *sw)
992{
993 if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
994 switch (sw->config.device_id) {
995 case PCI_DEVICE_ID_INTEL_TGL_NHI0:
996 case PCI_DEVICE_ID_INTEL_TGL_NHI1:
997 case PCI_DEVICE_ID_INTEL_TGL_H_NHI0:
998 case PCI_DEVICE_ID_INTEL_TGL_H_NHI1:
999 return true;
1000 }
1001 }
1002 return false;
1003}
1004
1005/**
1006 * tb_switch_is_icm() - Is the switch handled by ICM firmware
1007 * @sw: Switch to check
1008 *
1009 * In case there is a need to differentiate whether ICM firmware or SW CM
1010 * is handling @sw this function can be called. It is valid to call this
1011 * after tb_switch_alloc() and tb_switch_configure() has been called
1012 * (latter only for SW CM case).
1013 */
1014static inline bool tb_switch_is_icm(const struct tb_switch *sw)
1015{
1016 return !sw->config.enabled;
1017}
1018
1019int tb_switch_set_link_width(struct tb_switch *sw, enum tb_link_width width);
1020int tb_switch_configure_link(struct tb_switch *sw);
1021void tb_switch_unconfigure_link(struct tb_switch *sw);
1022
1023bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
1024int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
1025void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
1026
1027int tb_switch_tmu_init(struct tb_switch *sw);
1028int tb_switch_tmu_post_time(struct tb_switch *sw);
1029int tb_switch_tmu_disable(struct tb_switch *sw);
1030int tb_switch_tmu_enable(struct tb_switch *sw);
1031int tb_switch_tmu_configure(struct tb_switch *sw, enum tb_switch_tmu_mode mode);
1032
1033/**
1034 * tb_switch_tmu_is_configured() - Is given TMU mode configured
1035 * @sw: Router whose mode to check
1036 * @mode: Mode to check
1037 *
1038 * Checks if given router TMU mode is configured to @mode. Note the
1039 * router TMU might not be enabled to this mode.
1040 */
1041static inline bool tb_switch_tmu_is_configured(const struct tb_switch *sw,
1042 enum tb_switch_tmu_mode mode)
1043{
1044 return sw->tmu.mode_request == mode;
1045}
1046
1047/**
1048 * tb_switch_tmu_is_enabled() - Checks if the specified TMU mode is enabled
1049 * @sw: Router whose TMU mode to check
1050 *
1051 * Return true if hardware TMU configuration matches the requested
1052 * configuration (and is not %TB_SWITCH_TMU_MODE_OFF).
1053 */
1054static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw)
1055{
1056 return sw->tmu.mode != TB_SWITCH_TMU_MODE_OFF &&
1057 sw->tmu.mode == sw->tmu.mode_request;
1058}
1059
1060bool tb_port_clx_is_enabled(struct tb_port *port, unsigned int clx);
1061
1062int tb_switch_clx_init(struct tb_switch *sw);
1063int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx);
1064int tb_switch_clx_disable(struct tb_switch *sw);
1065
1066/**
1067 * tb_switch_clx_is_enabled() - Checks if the CLx is enabled
1068 * @sw: Router to check for the CLx
1069 * @clx: The CLx states to check for
1070 *
1071 * Checks if the specified CLx is enabled on the router upstream link.
1072 * Returns true if any of the given states is enabled.
1073 *
1074 * Not applicable for a host router.
1075 */
1076static inline bool tb_switch_clx_is_enabled(const struct tb_switch *sw,
1077 unsigned int clx)
1078{
1079 return sw->clx & clx;
1080}
1081
1082int tb_switch_pcie_l1_enable(struct tb_switch *sw);
1083
1084int tb_switch_xhci_connect(struct tb_switch *sw);
1085void tb_switch_xhci_disconnect(struct tb_switch *sw);
1086
1087int tb_port_state(struct tb_port *port);
1088int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
1089int tb_port_add_nfc_credits(struct tb_port *port, int credits);
1090int tb_port_clear_counter(struct tb_port *port, int counter);
1091int tb_port_unlock(struct tb_port *port);
1092int tb_port_enable(struct tb_port *port);
1093int tb_port_disable(struct tb_port *port);
1094int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid);
1095void tb_port_release_in_hopid(struct tb_port *port, int hopid);
1096int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid);
1097void tb_port_release_out_hopid(struct tb_port *port, int hopid);
1098struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
1099 struct tb_port *prev);
1100
1101/**
1102 * tb_port_path_direction_downstream() - Checks if path directed downstream
1103 * @src: Source adapter
1104 * @dst: Destination adapter
1105 *
1106 * Returns %true only if the specified path from source adapter (@src)
1107 * to destination adapter (@dst) is directed downstream.
1108 */
1109static inline bool
1110tb_port_path_direction_downstream(const struct tb_port *src,
1111 const struct tb_port *dst)
1112{
1113 return src->sw->config.depth < dst->sw->config.depth;
1114}
1115
1116static inline bool tb_port_use_credit_allocation(const struct tb_port *port)
1117{
1118 return tb_port_is_null(port) && port->sw->credit_allocation;
1119}
1120
1121/**
1122 * tb_for_each_port_on_path() - Iterate over each port on path
1123 * @src: Source port
1124 * @dst: Destination port
1125 * @p: Port used as iterator
1126 *
1127 * Walks over each port on path from @src to @dst.
1128 */
1129#define tb_for_each_port_on_path(src, dst, p) \
1130 for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \
1131 (p) = tb_next_port_on_path((src), (dst), (p)))
1132
1133/**
1134 * tb_for_each_upstream_port_on_path() - Iterate over each upstreamm port on path
1135 * @src: Source port
1136 * @dst: Destination port
1137 * @p: Port used as iterator
1138 *
1139 * Walks over each upstream lane adapter on path from @src to @dst.
1140 */
1141#define tb_for_each_upstream_port_on_path(src, dst, p) \
1142 for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \
1143 (p) = tb_next_port_on_path((src), (dst), (p))) \
1144 if (!tb_port_is_null((p)) || !tb_is_upstream_port((p))) {\
1145 continue; \
1146 } else
1147
1148int tb_port_get_link_speed(struct tb_port *port);
1149int tb_port_get_link_generation(struct tb_port *port);
1150int tb_port_get_link_width(struct tb_port *port);
1151bool tb_port_width_supported(struct tb_port *port, unsigned int width);
1152int tb_port_set_link_width(struct tb_port *port, enum tb_link_width width);
1153int tb_port_lane_bonding_enable(struct tb_port *port);
1154void tb_port_lane_bonding_disable(struct tb_port *port);
1155int tb_port_wait_for_link_width(struct tb_port *port, unsigned int width,
1156 int timeout_msec);
1157int tb_port_update_credits(struct tb_port *port);
1158
1159int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
1160int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
1161int tb_switch_next_cap(struct tb_switch *sw, unsigned int offset);
1162int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
1163int tb_port_next_cap(struct tb_port *port, unsigned int offset);
1164bool tb_port_is_enabled(struct tb_port *port);
1165
1166bool tb_usb3_port_is_enabled(struct tb_port *port);
1167int tb_usb3_port_enable(struct tb_port *port, bool enable);
1168
1169bool tb_pci_port_is_enabled(struct tb_port *port);
1170int tb_pci_port_enable(struct tb_port *port, bool enable);
1171
1172int tb_dp_port_hpd_is_active(struct tb_port *port);
1173int tb_dp_port_hpd_clear(struct tb_port *port);
1174int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
1175 unsigned int aux_tx, unsigned int aux_rx);
1176bool tb_dp_port_is_enabled(struct tb_port *port);
1177int tb_dp_port_enable(struct tb_port *port, bool enable);
1178
1179struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid,
1180 struct tb_port *dst, int dst_hopid,
1181 struct tb_port **last, const char *name,
1182 bool alloc_hopid);
1183struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid,
1184 struct tb_port *dst, int dst_hopid, int link_nr,
1185 const char *name);
1186void tb_path_free(struct tb_path *path);
1187int tb_path_activate(struct tb_path *path);
1188void tb_path_deactivate(struct tb_path *path);
1189int tb_path_deactivate_hop(struct tb_port *port, int hop_index);
1190bool tb_path_is_invalid(struct tb_path *path);
1191bool tb_path_port_on_path(const struct tb_path *path,
1192 const struct tb_port *port);
1193
1194/**
1195 * tb_path_for_each_hop() - Iterate over each hop on path
1196 * @path: Path whose hops to iterate
1197 * @hop: Hop used as iterator
1198 *
1199 * Iterates over each hop on path.
1200 */
1201#define tb_path_for_each_hop(path, hop) \
1202 for ((hop) = &(path)->hops[0]; \
1203 (hop) <= &(path)->hops[(path)->path_length - 1]; (hop)++)
1204
1205int tb_drom_read(struct tb_switch *sw);
1206int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
1207
1208int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid);
1209int tb_lc_reset_port(struct tb_port *port);
1210int tb_lc_configure_port(struct tb_port *port);
1211void tb_lc_unconfigure_port(struct tb_port *port);
1212int tb_lc_configure_xdomain(struct tb_port *port);
1213void tb_lc_unconfigure_xdomain(struct tb_port *port);
1214int tb_lc_start_lane_initialization(struct tb_port *port);
1215bool tb_lc_is_clx_supported(struct tb_port *port);
1216bool tb_lc_is_usb_plugged(struct tb_port *port);
1217bool tb_lc_is_xhci_connected(struct tb_port *port);
1218int tb_lc_xhci_connect(struct tb_port *port);
1219void tb_lc_xhci_disconnect(struct tb_port *port);
1220int tb_lc_set_wake(struct tb_switch *sw, unsigned int flags);
1221int tb_lc_set_sleep(struct tb_switch *sw);
1222bool tb_lc_lane_bonding_possible(struct tb_switch *sw);
1223bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in);
1224int tb_lc_dp_sink_alloc(struct tb_switch *sw, struct tb_port *in);
1225int tb_lc_dp_sink_dealloc(struct tb_switch *sw, struct tb_port *in);
1226int tb_lc_force_power(struct tb_switch *sw);
1227
1228static inline int tb_route_length(u64 route)
1229{
1230 return (fls64(x: route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
1231}
1232
1233/**
1234 * tb_downstream_route() - get route to downstream switch
1235 *
1236 * Port must not be the upstream port (otherwise a loop is created).
1237 *
1238 * Return: Returns a route to the switch behind @port.
1239 */
1240static inline u64 tb_downstream_route(struct tb_port *port)
1241{
1242 return tb_route(sw: port->sw)
1243 | ((u64) port->port << (port->sw->config.depth * 8));
1244}
1245
1246bool tb_is_xdomain_enabled(void);
1247bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type,
1248 const void *buf, size_t size);
1249struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent,
1250 u64 route, const uuid_t *local_uuid,
1251 const uuid_t *remote_uuid);
1252void tb_xdomain_add(struct tb_xdomain *xd);
1253void tb_xdomain_remove(struct tb_xdomain *xd);
1254struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link,
1255 u8 depth);
1256
1257static inline struct tb_switch *tb_xdomain_parent(struct tb_xdomain *xd)
1258{
1259 return tb_to_switch(dev: xd->dev.parent);
1260}
1261
1262/**
1263 * tb_xdomain_downstream_port() - Return downstream facing port of parent router
1264 * @xd: Xdomain pointer
1265 *
1266 * Returns the downstream port the XDomain is connected to.
1267 */
1268static inline struct tb_port *tb_xdomain_downstream_port(struct tb_xdomain *xd)
1269{
1270 return tb_port_at(route: xd->route, sw: tb_xdomain_parent(xd));
1271}
1272
1273int tb_retimer_nvm_read(struct tb_retimer *rt, unsigned int address, void *buf,
1274 size_t size);
1275int tb_retimer_scan(struct tb_port *port, bool add);
1276void tb_retimer_remove_all(struct tb_port *port);
1277
1278static inline bool tb_is_retimer(const struct device *dev)
1279{
1280 return dev->type == &tb_retimer_type;
1281}
1282
1283static inline struct tb_retimer *tb_to_retimer(struct device *dev)
1284{
1285 if (tb_is_retimer(dev))
1286 return container_of(dev, struct tb_retimer, dev);
1287 return NULL;
1288}
1289
1290/**
1291 * usb4_switch_version() - Returns USB4 version of the router
1292 * @sw: Router to check
1293 *
1294 * Returns major version of USB4 router (%1 for v1, %2 for v2 and so
1295 * on). Can be called to pre-USB4 router too and in that case returns %0.
1296 */
1297static inline unsigned int usb4_switch_version(const struct tb_switch *sw)
1298{
1299 return FIELD_GET(USB4_VERSION_MAJOR_MASK, sw->config.thunderbolt_version);
1300}
1301
1302/**
1303 * tb_switch_is_usb4() - Is the switch USB4 compliant
1304 * @sw: Switch to check
1305 *
1306 * Returns true if the @sw is USB4 compliant router, false otherwise.
1307 */
1308static inline bool tb_switch_is_usb4(const struct tb_switch *sw)
1309{
1310 return usb4_switch_version(sw) > 0;
1311}
1312
1313void usb4_switch_check_wakes(struct tb_switch *sw);
1314int usb4_switch_setup(struct tb_switch *sw);
1315int usb4_switch_configuration_valid(struct tb_switch *sw);
1316int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid);
1317int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
1318 size_t size);
1319bool usb4_switch_lane_bonding_possible(struct tb_switch *sw);
1320int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags);
1321int usb4_switch_set_sleep(struct tb_switch *sw);
1322int usb4_switch_nvm_sector_size(struct tb_switch *sw);
1323int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
1324 size_t size);
1325int usb4_switch_nvm_set_offset(struct tb_switch *sw, unsigned int address);
1326int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address,
1327 const void *buf, size_t size);
1328int usb4_switch_nvm_authenticate(struct tb_switch *sw);
1329int usb4_switch_nvm_authenticate_status(struct tb_switch *sw, u32 *status);
1330int usb4_switch_credits_init(struct tb_switch *sw);
1331bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
1332int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
1333int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
1334struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
1335 const struct tb_port *port);
1336struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
1337 const struct tb_port *port);
1338int usb4_switch_add_ports(struct tb_switch *sw);
1339void usb4_switch_remove_ports(struct tb_switch *sw);
1340
1341int usb4_port_unlock(struct tb_port *port);
1342int usb4_port_hotplug_enable(struct tb_port *port);
1343int usb4_port_reset(struct tb_port *port);
1344int usb4_port_configure(struct tb_port *port);
1345void usb4_port_unconfigure(struct tb_port *port);
1346int usb4_port_configure_xdomain(struct tb_port *port, struct tb_xdomain *xd);
1347void usb4_port_unconfigure_xdomain(struct tb_port *port);
1348int usb4_port_router_offline(struct tb_port *port);
1349int usb4_port_router_online(struct tb_port *port);
1350int usb4_port_enumerate_retimers(struct tb_port *port);
1351bool usb4_port_clx_supported(struct tb_port *port);
1352
1353bool usb4_port_asym_supported(struct tb_port *port);
1354int usb4_port_asym_set_link_width(struct tb_port *port, enum tb_link_width width);
1355int usb4_port_asym_start(struct tb_port *port);
1356
1357/**
1358 * enum tb_sb_target - Sideband transaction target
1359 * @USB4_SB_TARGET_ROUTER: Target is the router itself
1360 * @USB4_SB_TARGET_PARTNER: Target is partner
1361 * @USB4_SB_TARGET_RETIMER: Target is retimer
1362 */
1363enum usb4_sb_target {
1364 USB4_SB_TARGET_ROUTER,
1365 USB4_SB_TARGET_PARTNER,
1366 USB4_SB_TARGET_RETIMER,
1367};
1368
1369int usb4_port_sb_read(struct tb_port *port, enum usb4_sb_target target, u8 index,
1370 u8 reg, void *buf, u8 size);
1371int usb4_port_sb_write(struct tb_port *port, enum usb4_sb_target target,
1372 u8 index, u8 reg, const void *buf, u8 size);
1373
1374/**
1375 * enum usb4_margin_sw_error_counter - Software margining error counter operation
1376 * @USB4_MARGIN_SW_ERROR_COUNTER_NOP: No change in counter setup
1377 * @USB4_MARGIN_SW_ERROR_COUNTER_CLEAR: Set the error counter to 0, enable counter
1378 * @USB4_MARGIN_SW_ERROR_COUNTER_START: Start counter, count from last value
1379 * @USB4_MARGIN_SW_ERROR_COUNTER_STOP: Stop counter, do not clear value
1380 */
1381enum usb4_margin_sw_error_counter {
1382 USB4_MARGIN_SW_ERROR_COUNTER_NOP,
1383 USB4_MARGIN_SW_ERROR_COUNTER_CLEAR,
1384 USB4_MARGIN_SW_ERROR_COUNTER_START,
1385 USB4_MARGIN_SW_ERROR_COUNTER_STOP,
1386};
1387
1388enum usb4_margining_lane {
1389 USB4_MARGINING_LANE_RX0 = 0,
1390 USB4_MARGINING_LANE_RX1 = 1,
1391 USB4_MARGINING_LANE_RX2 = 2,
1392 USB4_MARGINING_LANE_ALL = 7,
1393};
1394
1395/**
1396 * struct usb4_port_margining_params - USB4 margining parameters
1397 * @error_counter: Error counter operation for software margining
1398 * @ber_level: Current BER level contour value
1399 * @lanes: Lanes to enable for the margining operation
1400 * @voltage_time_offset: Offset for voltage / time for software margining
1401 * @optional_voltage_offset_range: Enable optional extended voltage range
1402 * @right_high: %false if left/low margin test is performed, %true if right/high
1403 * @time: %true if time margining is used instead of voltage
1404 */
1405struct usb4_port_margining_params {
1406 enum usb4_margin_sw_error_counter error_counter;
1407 u32 ber_level;
1408 enum usb4_margining_lane lanes;
1409 u32 voltage_time_offset;
1410 bool optional_voltage_offset_range;
1411 bool right_high;
1412 bool upper_eye;
1413 bool time;
1414};
1415
1416int usb4_port_margining_caps(struct tb_port *port, enum usb4_sb_target target,
1417 u8 index, u32 *caps, size_t ncaps);
1418int usb4_port_hw_margin(struct tb_port *port, enum usb4_sb_target target,
1419 u8 index, const struct usb4_port_margining_params *params,
1420 u32 *results, size_t nresults);
1421int usb4_port_sw_margin(struct tb_port *port, enum usb4_sb_target target,
1422 u8 index, const struct usb4_port_margining_params *params,
1423 u32 *results);
1424int usb4_port_sw_margin_errors(struct tb_port *port, enum usb4_sb_target target,
1425 u8 index, u32 *errors);
1426
1427int usb4_port_retimer_set_inbound_sbtx(struct tb_port *port, u8 index);
1428int usb4_port_retimer_unset_inbound_sbtx(struct tb_port *port, u8 index);
1429int usb4_port_retimer_is_last(struct tb_port *port, u8 index);
1430int usb4_port_retimer_is_cable(struct tb_port *port, u8 index);
1431int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index);
1432int usb4_port_retimer_nvm_set_offset(struct tb_port *port, u8 index,
1433 unsigned int address);
1434int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index,
1435 unsigned int address, const void *buf,
1436 size_t size);
1437int usb4_port_retimer_nvm_authenticate(struct tb_port *port, u8 index);
1438int usb4_port_retimer_nvm_authenticate_status(struct tb_port *port, u8 index,
1439 u32 *status);
1440int usb4_port_retimer_nvm_read(struct tb_port *port, u8 index,
1441 unsigned int address, void *buf, size_t size);
1442
1443int usb4_usb3_port_max_link_rate(struct tb_port *port);
1444int usb4_usb3_port_allocated_bandwidth(struct tb_port *port, int *upstream_bw,
1445 int *downstream_bw);
1446int usb4_usb3_port_allocate_bandwidth(struct tb_port *port, int *upstream_bw,
1447 int *downstream_bw);
1448int usb4_usb3_port_release_bandwidth(struct tb_port *port, int *upstream_bw,
1449 int *downstream_bw);
1450
1451int usb4_dp_port_set_cm_id(struct tb_port *port, int cm_id);
1452bool usb4_dp_port_bandwidth_mode_supported(struct tb_port *port);
1453bool usb4_dp_port_bandwidth_mode_enabled(struct tb_port *port);
1454int usb4_dp_port_set_cm_bandwidth_mode_supported(struct tb_port *port,
1455 bool supported);
1456int usb4_dp_port_group_id(struct tb_port *port);
1457int usb4_dp_port_set_group_id(struct tb_port *port, int group_id);
1458int usb4_dp_port_nrd(struct tb_port *port, int *rate, int *lanes);
1459int usb4_dp_port_set_nrd(struct tb_port *port, int rate, int lanes);
1460int usb4_dp_port_granularity(struct tb_port *port);
1461int usb4_dp_port_set_granularity(struct tb_port *port, int granularity);
1462int usb4_dp_port_set_estimated_bandwidth(struct tb_port *port, int bw);
1463int usb4_dp_port_allocated_bandwidth(struct tb_port *port);
1464int usb4_dp_port_allocate_bandwidth(struct tb_port *port, int bw);
1465int usb4_dp_port_requested_bandwidth(struct tb_port *port);
1466
1467int usb4_pci_port_set_ext_encapsulation(struct tb_port *port, bool enable);
1468
1469static inline bool tb_is_usb4_port_device(const struct device *dev)
1470{
1471 return dev->type == &usb4_port_device_type;
1472}
1473
1474static inline struct usb4_port *tb_to_usb4_port_device(struct device *dev)
1475{
1476 if (tb_is_usb4_port_device(dev))
1477 return container_of(dev, struct usb4_port, dev);
1478 return NULL;
1479}
1480
1481struct usb4_port *usb4_port_device_add(struct tb_port *port);
1482void usb4_port_device_remove(struct usb4_port *usb4);
1483int usb4_port_device_resume(struct usb4_port *usb4);
1484int usb4_port_index(const struct tb_switch *sw, const struct tb_port *port);
1485
1486static inline bool usb4_port_device_is_offline(const struct usb4_port *usb4)
1487{
1488 return usb4->offline;
1489}
1490
1491void tb_check_quirks(struct tb_switch *sw);
1492
1493#ifdef CONFIG_ACPI
1494bool tb_acpi_add_links(struct tb_nhi *nhi);
1495
1496bool tb_acpi_is_native(void);
1497bool tb_acpi_may_tunnel_usb3(void);
1498bool tb_acpi_may_tunnel_dp(void);
1499bool tb_acpi_may_tunnel_pcie(void);
1500bool tb_acpi_is_xdomain_allowed(void);
1501
1502int tb_acpi_init(void);
1503void tb_acpi_exit(void);
1504int tb_acpi_power_on_retimers(struct tb_port *port);
1505int tb_acpi_power_off_retimers(struct tb_port *port);
1506#else
1507static inline bool tb_acpi_add_links(struct tb_nhi *nhi) { return false; }
1508
1509static inline bool tb_acpi_is_native(void) { return true; }
1510static inline bool tb_acpi_may_tunnel_usb3(void) { return true; }
1511static inline bool tb_acpi_may_tunnel_dp(void) { return true; }
1512static inline bool tb_acpi_may_tunnel_pcie(void) { return true; }
1513static inline bool tb_acpi_is_xdomain_allowed(void) { return true; }
1514
1515static inline int tb_acpi_init(void) { return 0; }
1516static inline void tb_acpi_exit(void) { }
1517static inline int tb_acpi_power_on_retimers(struct tb_port *port) { return 0; }
1518static inline int tb_acpi_power_off_retimers(struct tb_port *port) { return 0; }
1519#endif
1520
1521#ifdef CONFIG_DEBUG_FS
1522void tb_debugfs_init(void);
1523void tb_debugfs_exit(void);
1524void tb_switch_debugfs_init(struct tb_switch *sw);
1525void tb_switch_debugfs_remove(struct tb_switch *sw);
1526void tb_xdomain_debugfs_init(struct tb_xdomain *xd);
1527void tb_xdomain_debugfs_remove(struct tb_xdomain *xd);
1528void tb_service_debugfs_init(struct tb_service *svc);
1529void tb_service_debugfs_remove(struct tb_service *svc);
1530void tb_retimer_debugfs_init(struct tb_retimer *rt);
1531void tb_retimer_debugfs_remove(struct tb_retimer *rt);
1532#else
1533static inline void tb_debugfs_init(void) { }
1534static inline void tb_debugfs_exit(void) { }
1535static inline void tb_switch_debugfs_init(struct tb_switch *sw) { }
1536static inline void tb_switch_debugfs_remove(struct tb_switch *sw) { }
1537static inline void tb_xdomain_debugfs_init(struct tb_xdomain *xd) { }
1538static inline void tb_xdomain_debugfs_remove(struct tb_xdomain *xd) { }
1539static inline void tb_service_debugfs_init(struct tb_service *svc) { }
1540static inline void tb_service_debugfs_remove(struct tb_service *svc) { }
1541static inline void tb_retimer_debugfs_init(struct tb_retimer *rt) { }
1542static inline void tb_retimer_debugfs_remove(struct tb_retimer *rt) { }
1543#endif
1544
1545#endif
1546

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source code of linux/drivers/thunderbolt/tb.h