1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Thunderbolt driver - bus logic (NHI independent)
5 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
6 * Copyright (C) 2018, Intel Corporation
12 #include <linux/nvmem-provider.h>
13 #include <linux/pci.h>
14 #include <linux/thunderbolt.h>
15 #include <linux/uuid.h>
21 #define NVM_MIN_SIZE SZ_32K
22 #define NVM_MAX_SIZE SZ_512K
24 /* Intel specific NVM offsets */
25 #define NVM_DEVID 0x05
26 #define NVM_VERSION 0x08
27 #define NVM_FLASH_SIZE 0x45
30 * struct tb_nvm - Structure holding NVM information
31 * @dev: Owner of the NVM
32 * @major: Major version number of the active NVM portion
33 * @minor: Minor version number of the active NVM portion
34 * @id: Identifier used with both NVM portions
35 * @active: Active portion NVMem device
36 * @non_active: Non-active portion NVMem device
37 * @buf: Buffer where the NVM image is stored before it is written to
38 * the actual NVM flash device
39 * @buf_data_size: Number of bytes actually consumed by the new NVM
41 * @authenticating: The device is authenticating the new NVM
42 * @flushed: The image has been flushed to the storage area
44 * The user of this structure needs to handle serialization of possible
52 struct nvmem_device *active;
53 struct nvmem_device *non_active;
60 #define TB_SWITCH_KEY_SIZE 32
61 #define TB_SWITCH_MAX_DEPTH 6
62 #define USB4_SWITCH_MAX_DEPTH 5
65 * enum tb_switch_tmu_rate - TMU refresh rate
66 * @TB_SWITCH_TMU_RATE_OFF: %0 (Disable Time Sync handshake)
67 * @TB_SWITCH_TMU_RATE_HIFI: %16 us time interval between successive
68 * transmission of the Delay Request TSNOS
69 * (Time Sync Notification Ordered Set) on a Link
70 * @TB_SWITCH_TMU_RATE_NORMAL: %1 ms time interval between successive
71 * transmission of the Delay Request TSNOS on
74 enum tb_switch_tmu_rate {
75 TB_SWITCH_TMU_RATE_OFF = 0,
76 TB_SWITCH_TMU_RATE_HIFI = 16,
77 TB_SWITCH_TMU_RATE_NORMAL = 1000,
81 * struct tb_switch_tmu - Structure holding switch TMU configuration
82 * @cap: Offset to the TMU capability (%0 if not found)
83 * @has_ucap: Does the switch support uni-directional mode
84 * @rate: TMU refresh rate related to upstream switch. In case of root
85 * switch this holds the domain rate.
86 * @unidirectional: Is the TMU in uni-directional or bi-directional mode
87 * related to upstream switch. Don't case for root switch.
89 struct tb_switch_tmu {
92 enum tb_switch_tmu_rate rate;
97 * struct tb_switch - a thunderbolt switch
98 * @dev: Device for the switch
99 * @config: Switch configuration
100 * @ports: Ports in this switch
101 * @dma_port: If the switch has port supporting DMA configuration based
102 * mailbox this will hold the pointer to that (%NULL
103 * otherwise). If set it also means the switch has
105 * @tmu: The switch TMU configuration
106 * @tb: Pointer to the domain the switch belongs to
107 * @uid: Unique ID of the switch
108 * @uuid: UUID of the switch (or %NULL if not supported)
109 * @vendor: Vendor ID of the switch
110 * @device: Device ID of the switch
111 * @vendor_name: Name of the vendor (or %NULL if not known)
112 * @device_name: Name of the device (or %NULL if not known)
113 * @link_speed: Speed of the link in Gb/s
114 * @link_width: Width of the link (1 or 2)
115 * @link_usb4: Upstream link is USB4
116 * @generation: Switch Thunderbolt generation
117 * @cap_plug_events: Offset to the plug events capability (%0 if not found)
118 * @cap_lc: Offset to the link controller capability (%0 if not found)
119 * @is_unplugged: The switch is going away
120 * @drom: DROM of the switch (%NULL if not found)
121 * @nvm: Pointer to the NVM if the switch has one (%NULL otherwise)
122 * @no_nvm_upgrade: Prevent NVM upgrade of this switch
123 * @safe_mode: The switch is in safe-mode
124 * @boot: Whether the switch was already authorized on boot or not
125 * @rpm: The switch supports runtime PM
126 * @authorized: Whether the switch is authorized by user or policy
127 * @security_level: Switch supported security level
128 * @key: Contains the key used to challenge the device or %NULL if not
129 * supported. Size of the key is %TB_SWITCH_KEY_SIZE.
130 * @connection_id: Connection ID used with ICM messaging
131 * @connection_key: Connection key used with ICM messaging
132 * @link: Root switch link this switch is connected (ICM only)
133 * @depth: Depth in the chain this switch is connected (ICM only)
134 * @rpm_complete: Completion used to wait for runtime resume to
135 * complete (ICM only)
137 * When the switch is being added or removed to the domain (other
138 * switches) you need to have domain lock held.
142 struct tb_regs_switch_header config;
143 struct tb_port *ports;
144 struct tb_dma_port *dma_port;
145 struct tb_switch_tmu tmu;
151 const char *vendor_name;
152 const char *device_name;
153 unsigned int link_speed;
154 unsigned int link_width;
156 unsigned int generation;
166 unsigned int authorized;
167 enum tb_security_level security_level;
173 struct completion rpm_complete;
177 * struct tb_port - a thunderbolt port, part of a tb_switch
178 * @config: Cached port configuration read from registers
179 * @sw: Switch the port belongs to
180 * @remote: Remote port (%NULL if not connected)
181 * @xdomain: Remote host (%NULL if not connected)
182 * @cap_phy: Offset, zero if not found
183 * @cap_tmu: Offset of the adapter specific TMU capability (%0 if not present)
184 * @cap_adap: Offset of the adapter specific capability (%0 if not present)
185 * @cap_usb4: Offset to the USB4 port capability (%0 if not present)
186 * @port: Port number on switch
187 * @disabled: Disabled by eeprom
188 * @bonded: true if the port is bonded (two lanes combined as one)
189 * @dual_link_port: If the switch is connected using two ports, points
191 * @link_nr: Is this primary or secondary port on the dual_link.
192 * @in_hopids: Currently allocated input HopIDs
193 * @out_hopids: Currently allocated output HopIDs
194 * @list: Used to link ports to DP resources list
197 struct tb_regs_port_header config;
198 struct tb_switch *sw;
199 struct tb_port *remote;
200 struct tb_xdomain *xdomain;
208 struct tb_port *dual_link_port;
210 struct ida in_hopids;
211 struct ida out_hopids;
212 struct list_head list;
216 * tb_retimer: Thunderbolt retimer
217 * @dev: Device for the retimer
218 * @tb: Pointer to the domain the retimer belongs to
219 * @index: Retimer index facing the router USB4 port
220 * @vendor: Vendor ID of the retimer
221 * @device: Device ID of the retimer
222 * @port: Pointer to the lane 0 adapter
223 * @nvm: Pointer to the NVM if the retimer has one (%NULL otherwise)
224 * @auth_status: Status of last NVM authentication
232 struct tb_port *port;
238 * struct tb_path_hop - routing information for a tb_path
239 * @in_port: Ingress port of a switch
240 * @out_port: Egress port of a switch where the packet is routed out
241 * (must be on the same switch than @in_port)
242 * @in_hop_index: HopID where the path configuration entry is placed in
243 * the path config space of @in_port.
244 * @in_counter_index: Used counter index (not used in the driver
245 * currently, %-1 to disable)
246 * @next_hop_index: HopID of the packet when it is routed out from @out_port
247 * @initial_credits: Number of initial flow control credits allocated for
250 * Hop configuration is always done on the IN port of a switch.
251 * in_port and out_port have to be on the same switch. Packets arriving on
252 * in_port with "hop" = in_hop_index will get routed to through out_port. The
253 * next hop to take (on out_port->remote) is determined by
254 * next_hop_index. When routing packet to another switch (out->remote is
255 * set) the @next_hop_index must match the @in_hop_index of that next
256 * hop to make routing possible.
258 * in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
262 struct tb_port *in_port;
263 struct tb_port *out_port;
265 int in_counter_index;
267 unsigned int initial_credits;
271 * enum tb_path_port - path options mask
272 * @TB_PATH_NONE: Do not activate on any hop on path
273 * @TB_PATH_SOURCE: Activate on the first hop (out of src)
274 * @TB_PATH_INTERNAL: Activate on the intermediate hops (not the first/last)
275 * @TB_PATH_DESTINATION: Activate on the last hop (into dst)
276 * @TB_PATH_ALL: Activate on all hops on the path
281 TB_PATH_INTERNAL = 2,
282 TB_PATH_DESTINATION = 4,
287 * struct tb_path - a unidirectional path between two ports
288 * @tb: Pointer to the domain structure
289 * @name: Name of the path (used for debugging)
290 * @nfc_credits: Number of non flow controlled credits allocated for the path
291 * @ingress_shared_buffer: Shared buffering used for ingress ports on the path
292 * @egress_shared_buffer: Shared buffering used for egress ports on the path
293 * @ingress_fc_enable: Flow control for ingress ports on the path
294 * @egress_fc_enable: Flow control for egress ports on the path
295 * @priority: Priority group if the path
296 * @weight: Weight of the path inside the priority group
297 * @drop_packages: Drop packages from queue tail or head
298 * @activated: Is the path active
299 * @clear_fc: Clear all flow control from the path config space entries
300 * when deactivating this path
302 * @path_length: How many hops the path uses
304 * A path consists of a number of hops (see &struct tb_path_hop). To
305 * establish a PCIe tunnel two paths have to be created between the two
312 enum tb_path_port ingress_shared_buffer;
313 enum tb_path_port egress_shared_buffer;
314 enum tb_path_port ingress_fc_enable;
315 enum tb_path_port egress_fc_enable;
317 unsigned int priority:3;
322 struct tb_path_hop *hops;
326 /* HopIDs 0-7 are reserved by the Thunderbolt protocol */
327 #define TB_PATH_MIN_HOPID 8
329 * Support paths from the farthest (depth 6) router to the host and back
330 * to the same level (not necessarily to the same router).
332 #define TB_PATH_MAX_HOPS (7 * 2)
335 * struct tb_cm_ops - Connection manager specific operations vector
336 * @driver_ready: Called right after control channel is started. Used by
337 * ICM to send driver ready message to the firmware.
338 * @start: Starts the domain
339 * @stop: Stops the domain
340 * @suspend_noirq: Connection manager specific suspend_noirq
341 * @resume_noirq: Connection manager specific resume_noirq
342 * @suspend: Connection manager specific suspend
343 * @complete: Connection manager specific complete
344 * @runtime_suspend: Connection manager specific runtime_suspend
345 * @runtime_resume: Connection manager specific runtime_resume
346 * @runtime_suspend_switch: Runtime suspend a switch
347 * @runtime_resume_switch: Runtime resume a switch
348 * @handle_event: Handle thunderbolt event
349 * @get_boot_acl: Get boot ACL list
350 * @set_boot_acl: Set boot ACL list
351 * @approve_switch: Approve switch
352 * @add_switch_key: Add key to switch
353 * @challenge_switch_key: Challenge switch using key
354 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
355 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths
356 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths
359 int (*driver_ready)(struct tb *tb);
360 int (*start)(struct tb *tb);
361 void (*stop)(struct tb *tb);
362 int (*suspend_noirq)(struct tb *tb);
363 int (*resume_noirq)(struct tb *tb);
364 int (*suspend)(struct tb *tb);
365 void (*complete)(struct tb *tb);
366 int (*runtime_suspend)(struct tb *tb);
367 int (*runtime_resume)(struct tb *tb);
368 int (*runtime_suspend_switch)(struct tb_switch *sw);
369 int (*runtime_resume_switch)(struct tb_switch *sw);
370 void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type,
371 const void *buf, size_t size);
372 int (*get_boot_acl)(struct tb *tb, uuid_t *uuids, size_t nuuids);
373 int (*set_boot_acl)(struct tb *tb, const uuid_t *uuids, size_t nuuids);
374 int (*approve_switch)(struct tb *tb, struct tb_switch *sw);
375 int (*add_switch_key)(struct tb *tb, struct tb_switch *sw);
376 int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw,
377 const u8 *challenge, u8 *response);
378 int (*disconnect_pcie_paths)(struct tb *tb);
379 int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
380 int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
383 static inline void *tb_priv(struct tb *tb)
385 return (void *)tb->privdata;
388 #define TB_AUTOSUSPEND_DELAY 15000 /* ms */
390 /* helper functions & macros */
393 * tb_upstream_port() - return the upstream port of a switch
395 * Every switch has an upstream port (for the root switch it is the NHI).
397 * During switch alloc/init tb_upstream_port()->remote may be NULL, even for
398 * non root switches (on the NHI port remote is always NULL).
400 * Return: Returns the upstream port of the switch.
402 static inline struct tb_port *tb_upstream_port(struct tb_switch *sw)
404 return &sw->ports[sw->config.upstream_port_number];
408 * tb_is_upstream_port() - Is the port upstream facing
409 * @port: Port to check
411 * Returns true if @port is upstream facing port. In case of dual link
412 * ports both return true.
414 static inline bool tb_is_upstream_port(const struct tb_port *port)
416 const struct tb_port *upstream_port = tb_upstream_port(port->sw);
417 return port == upstream_port || port->dual_link_port == upstream_port;
420 static inline u64 tb_route(const struct tb_switch *sw)
422 return ((u64) sw->config.route_hi) << 32 | sw->config.route_lo;
425 static inline struct tb_port *tb_port_at(u64 route, struct tb_switch *sw)
429 port = route >> (sw->config.depth * 8);
430 if (WARN_ON(port > sw->config.max_port_number))
432 return &sw->ports[port];
436 * tb_port_has_remote() - Does the port have switch connected downstream
437 * @port: Port to check
439 * Returns true only when the port is primary port and has remote set.
441 static inline bool tb_port_has_remote(const struct tb_port *port)
443 if (tb_is_upstream_port(port))
447 if (port->dual_link_port && port->link_nr)
453 static inline bool tb_port_is_null(const struct tb_port *port)
455 return port && port->port && port->config.type == TB_TYPE_PORT;
458 static inline bool tb_port_is_pcie_down(const struct tb_port *port)
460 return port && port->config.type == TB_TYPE_PCIE_DOWN;
463 static inline bool tb_port_is_pcie_up(const struct tb_port *port)
465 return port && port->config.type == TB_TYPE_PCIE_UP;
468 static inline bool tb_port_is_dpin(const struct tb_port *port)
470 return port && port->config.type == TB_TYPE_DP_HDMI_IN;
473 static inline bool tb_port_is_dpout(const struct tb_port *port)
475 return port && port->config.type == TB_TYPE_DP_HDMI_OUT;
478 static inline bool tb_port_is_usb3_down(const struct tb_port *port)
480 return port && port->config.type == TB_TYPE_USB3_DOWN;
483 static inline bool tb_port_is_usb3_up(const struct tb_port *port)
485 return port && port->config.type == TB_TYPE_USB3_UP;
488 static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
489 enum tb_cfg_space space, u32 offset, u32 length)
491 if (sw->is_unplugged)
493 return tb_cfg_read(sw->tb->ctl,
502 static inline int tb_sw_write(struct tb_switch *sw, const void *buffer,
503 enum tb_cfg_space space, u32 offset, u32 length)
505 if (sw->is_unplugged)
507 return tb_cfg_write(sw->tb->ctl,
516 static inline int tb_port_read(struct tb_port *port, void *buffer,
517 enum tb_cfg_space space, u32 offset, u32 length)
519 if (port->sw->is_unplugged)
521 return tb_cfg_read(port->sw->tb->ctl,
530 static inline int tb_port_write(struct tb_port *port, const void *buffer,
531 enum tb_cfg_space space, u32 offset, u32 length)
533 if (port->sw->is_unplugged)
535 return tb_cfg_write(port->sw->tb->ctl,
544 #define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
545 #define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
546 #define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
547 #define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
548 #define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg)
550 #define __TB_SW_PRINT(level, sw, fmt, arg...) \
552 const struct tb_switch *__sw = (sw); \
553 level(__sw->tb, "%llx: " fmt, \
554 tb_route(__sw), ## arg); \
556 #define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
557 #define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
558 #define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
559 #define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg)
561 #define __TB_PORT_PRINT(level, _port, fmt, arg...) \
563 const struct tb_port *__port = (_port); \
564 level(__port->sw->tb, "%llx:%x: " fmt, \
565 tb_route(__port->sw), __port->port, ## arg); \
567 #define tb_port_WARN(port, fmt, arg...) \
568 __TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
569 #define tb_port_warn(port, fmt, arg...) \
570 __TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
571 #define tb_port_info(port, fmt, arg...) \
572 __TB_PORT_PRINT(tb_info, port, fmt, ##arg)
573 #define tb_port_dbg(port, fmt, arg...) \
574 __TB_PORT_PRINT(tb_dbg, port, fmt, ##arg)
576 struct tb *icm_probe(struct tb_nhi *nhi);
577 struct tb *tb_probe(struct tb_nhi *nhi);
579 extern struct device_type tb_domain_type;
580 extern struct device_type tb_retimer_type;
581 extern struct device_type tb_switch_type;
583 int tb_domain_init(void);
584 void tb_domain_exit(void);
585 int tb_xdomain_init(void);
586 void tb_xdomain_exit(void);
588 struct tb *tb_domain_alloc(struct tb_nhi *nhi, size_t privsize);
589 int tb_domain_add(struct tb *tb);
590 void tb_domain_remove(struct tb *tb);
591 int tb_domain_suspend_noirq(struct tb *tb);
592 int tb_domain_resume_noirq(struct tb *tb);
593 int tb_domain_suspend(struct tb *tb);
594 void tb_domain_complete(struct tb *tb);
595 int tb_domain_runtime_suspend(struct tb *tb);
596 int tb_domain_runtime_resume(struct tb *tb);
597 int tb_domain_approve_switch(struct tb *tb, struct tb_switch *sw);
598 int tb_domain_approve_switch_key(struct tb *tb, struct tb_switch *sw);
599 int tb_domain_challenge_switch_key(struct tb *tb, struct tb_switch *sw);
600 int tb_domain_disconnect_pcie_paths(struct tb *tb);
601 int tb_domain_approve_xdomain_paths(struct tb *tb, struct tb_xdomain *xd);
602 int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd);
603 int tb_domain_disconnect_all_paths(struct tb *tb);
605 static inline struct tb *tb_domain_get(struct tb *tb)
608 get_device(&tb->dev);
612 static inline void tb_domain_put(struct tb *tb)
614 put_device(&tb->dev);
617 struct tb_nvm *tb_nvm_alloc(struct device *dev);
618 int tb_nvm_add_active(struct tb_nvm *nvm, size_t size, nvmem_reg_read_t reg_read);
619 int tb_nvm_write_buf(struct tb_nvm *nvm, unsigned int offset, void *val,
621 int tb_nvm_add_non_active(struct tb_nvm *nvm, size_t size,
622 nvmem_reg_write_t reg_write);
623 void tb_nvm_free(struct tb_nvm *nvm);
624 void tb_nvm_exit(void);
626 struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
628 struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
629 struct device *parent, u64 route);
630 int tb_switch_configure(struct tb_switch *sw);
631 int tb_switch_add(struct tb_switch *sw);
632 void tb_switch_remove(struct tb_switch *sw);
633 void tb_switch_suspend(struct tb_switch *sw);
634 int tb_switch_resume(struct tb_switch *sw);
635 int tb_switch_reset(struct tb *tb, u64 route);
636 void tb_sw_set_unplugged(struct tb_switch *sw);
637 struct tb_port *tb_switch_find_port(struct tb_switch *sw,
638 enum tb_port_type type);
639 struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link,
641 struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid);
642 struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route);
645 * tb_switch_for_each_port() - Iterate over each switch port
646 * @sw: Switch whose ports to iterate
647 * @p: Port used as iterator
649 * Iterates over each switch port skipping the control port (port %0).
651 #define tb_switch_for_each_port(sw, p) \
652 for ((p) = &(sw)->ports[1]; \
653 (p) <= &(sw)->ports[(sw)->config.max_port_number]; (p)++)
655 static inline struct tb_switch *tb_switch_get(struct tb_switch *sw)
658 get_device(&sw->dev);
662 static inline void tb_switch_put(struct tb_switch *sw)
664 put_device(&sw->dev);
667 static inline bool tb_is_switch(const struct device *dev)
669 return dev->type == &tb_switch_type;
672 static inline struct tb_switch *tb_to_switch(struct device *dev)
674 if (tb_is_switch(dev))
675 return container_of(dev, struct tb_switch, dev);
679 static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw)
681 return tb_to_switch(sw->dev.parent);
684 static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
686 return sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE;
689 static inline bool tb_switch_is_eagle_ridge(const struct tb_switch *sw)
691 return sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE;
694 static inline bool tb_switch_is_cactus_ridge(const struct tb_switch *sw)
696 switch (sw->config.device_id) {
697 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
698 case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
705 static inline bool tb_switch_is_falcon_ridge(const struct tb_switch *sw)
707 switch (sw->config.device_id) {
708 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
709 case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
716 static inline bool tb_switch_is_alpine_ridge(const struct tb_switch *sw)
718 switch (sw->config.device_id) {
719 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
720 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
721 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
722 case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
729 static inline bool tb_switch_is_titan_ridge(const struct tb_switch *sw)
731 switch (sw->config.device_id) {
732 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
733 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
734 case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
742 * tb_switch_is_usb4() - Is the switch USB4 compliant
743 * @sw: Switch to check
745 * Returns true if the @sw is USB4 compliant router, false otherwise.
747 static inline bool tb_switch_is_usb4(const struct tb_switch *sw)
749 return sw->config.thunderbolt_version == USB4_VERSION_1_0;
753 * tb_switch_is_icm() - Is the switch handled by ICM firmware
754 * @sw: Switch to check
756 * In case there is a need to differentiate whether ICM firmware or SW CM
757 * is handling @sw this function can be called. It is valid to call this
758 * after tb_switch_alloc() and tb_switch_configure() has been called
759 * (latter only for SW CM case).
761 static inline bool tb_switch_is_icm(const struct tb_switch *sw)
763 return !sw->config.enabled;
766 int tb_switch_lane_bonding_enable(struct tb_switch *sw);
767 void tb_switch_lane_bonding_disable(struct tb_switch *sw);
769 bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
770 int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
771 void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
773 int tb_switch_tmu_init(struct tb_switch *sw);
774 int tb_switch_tmu_post_time(struct tb_switch *sw);
775 int tb_switch_tmu_disable(struct tb_switch *sw);
776 int tb_switch_tmu_enable(struct tb_switch *sw);
778 static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw)
780 return sw->tmu.rate == TB_SWITCH_TMU_RATE_HIFI &&
781 !sw->tmu.unidirectional;
784 int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
785 int tb_port_add_nfc_credits(struct tb_port *port, int credits);
786 int tb_port_set_initial_credits(struct tb_port *port, u32 credits);
787 int tb_port_clear_counter(struct tb_port *port, int counter);
788 int tb_port_unlock(struct tb_port *port);
789 int tb_port_alloc_in_hopid(struct tb_port *port, int hopid, int max_hopid);
790 void tb_port_release_in_hopid(struct tb_port *port, int hopid);
791 int tb_port_alloc_out_hopid(struct tb_port *port, int hopid, int max_hopid);
792 void tb_port_release_out_hopid(struct tb_port *port, int hopid);
793 struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
794 struct tb_port *prev);
797 * tb_for_each_port_on_path() - Iterate over each port on path
799 * @dst: Destination port
800 * @p: Port used as iterator
802 * Walks over each port on path from @src to @dst.
804 #define tb_for_each_port_on_path(src, dst, p) \
805 for ((p) = tb_next_port_on_path((src), (dst), NULL); (p); \
806 (p) = tb_next_port_on_path((src), (dst), (p)))
808 int tb_port_get_link_speed(struct tb_port *port);
810 int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
811 int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
812 int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
813 bool tb_port_is_enabled(struct tb_port *port);
815 bool tb_usb3_port_is_enabled(struct tb_port *port);
816 int tb_usb3_port_enable(struct tb_port *port, bool enable);
818 bool tb_pci_port_is_enabled(struct tb_port *port);
819 int tb_pci_port_enable(struct tb_port *port, bool enable);
821 int tb_dp_port_hpd_is_active(struct tb_port *port);
822 int tb_dp_port_hpd_clear(struct tb_port *port);
823 int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
824 unsigned int aux_tx, unsigned int aux_rx);
825 bool tb_dp_port_is_enabled(struct tb_port *port);
826 int tb_dp_port_enable(struct tb_port *port, bool enable);
828 struct tb_path *tb_path_discover(struct tb_port *src, int src_hopid,
829 struct tb_port *dst, int dst_hopid,
830 struct tb_port **last, const char *name);
831 struct tb_path *tb_path_alloc(struct tb *tb, struct tb_port *src, int src_hopid,
832 struct tb_port *dst, int dst_hopid, int link_nr,
834 void tb_path_free(struct tb_path *path);
835 int tb_path_activate(struct tb_path *path);
836 void tb_path_deactivate(struct tb_path *path);
837 bool tb_path_is_invalid(struct tb_path *path);
838 bool tb_path_port_on_path(const struct tb_path *path,
839 const struct tb_port *port);
841 int tb_drom_read(struct tb_switch *sw);
842 int tb_drom_read_uid_only(struct tb_switch *sw, u64 *uid);
844 int tb_lc_read_uuid(struct tb_switch *sw, u32 *uuid);
845 int tb_lc_configure_link(struct tb_switch *sw);
846 void tb_lc_unconfigure_link(struct tb_switch *sw);
847 int tb_lc_set_sleep(struct tb_switch *sw);
848 bool tb_lc_lane_bonding_possible(struct tb_switch *sw);
849 bool tb_lc_dp_sink_query(struct tb_switch *sw, struct tb_port *in);
850 int tb_lc_dp_sink_alloc(struct tb_switch *sw, struct tb_port *in);
851 int tb_lc_dp_sink_dealloc(struct tb_switch *sw, struct tb_port *in);
853 static inline int tb_route_length(u64 route)
855 return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
859 * tb_downstream_route() - get route to downstream switch
861 * Port must not be the upstream port (otherwise a loop is created).
863 * Return: Returns a route to the switch behind @port.
865 static inline u64 tb_downstream_route(struct tb_port *port)
867 return tb_route(port->sw)
868 | ((u64) port->port << (port->sw->config.depth * 8));
871 bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type,
872 const void *buf, size_t size);
873 struct tb_xdomain *tb_xdomain_alloc(struct tb *tb, struct device *parent,
874 u64 route, const uuid_t *local_uuid,
875 const uuid_t *remote_uuid);
876 void tb_xdomain_add(struct tb_xdomain *xd);
877 void tb_xdomain_remove(struct tb_xdomain *xd);
878 struct tb_xdomain *tb_xdomain_find_by_link_depth(struct tb *tb, u8 link,
881 int tb_retimer_scan(struct tb_port *port);
882 void tb_retimer_remove_all(struct tb_port *port);
884 static inline bool tb_is_retimer(const struct device *dev)
886 return dev->type == &tb_retimer_type;
889 static inline struct tb_retimer *tb_to_retimer(struct device *dev)
891 if (tb_is_retimer(dev))
892 return container_of(dev, struct tb_retimer, dev);
896 int usb4_switch_setup(struct tb_switch *sw);
897 int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid);
898 int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
900 int usb4_switch_configure_link(struct tb_switch *sw);
901 void usb4_switch_unconfigure_link(struct tb_switch *sw);
902 bool usb4_switch_lane_bonding_possible(struct tb_switch *sw);
903 int usb4_switch_set_sleep(struct tb_switch *sw);
904 int usb4_switch_nvm_sector_size(struct tb_switch *sw);
905 int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
907 int usb4_switch_nvm_write(struct tb_switch *sw, unsigned int address,
908 const void *buf, size_t size);
909 int usb4_switch_nvm_authenticate(struct tb_switch *sw);
910 bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
911 int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
912 int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
913 struct tb_port *usb4_switch_map_pcie_down(struct tb_switch *sw,
914 const struct tb_port *port);
915 struct tb_port *usb4_switch_map_usb3_down(struct tb_switch *sw,
916 const struct tb_port *port);
918 int usb4_port_unlock(struct tb_port *port);
919 int usb4_port_enumerate_retimers(struct tb_port *port);
921 int usb4_port_retimer_read(struct tb_port *port, u8 index, u8 reg, void *buf,
923 int usb4_port_retimer_write(struct tb_port *port, u8 index, u8 reg,
924 const void *buf, u8 size);
925 int usb4_port_retimer_is_last(struct tb_port *port, u8 index);
926 int usb4_port_retimer_nvm_sector_size(struct tb_port *port, u8 index);
927 int usb4_port_retimer_nvm_write(struct tb_port *port, u8 index,
928 unsigned int address, const void *buf,
930 int usb4_port_retimer_nvm_authenticate(struct tb_port *port, u8 index);
931 int usb4_port_retimer_nvm_authenticate_status(struct tb_port *port, u8 index,
933 int usb4_port_retimer_nvm_read(struct tb_port *port, u8 index,
934 unsigned int address, void *buf, size_t size);
936 int usb4_usb3_port_max_link_rate(struct tb_port *port);
937 int usb4_usb3_port_actual_link_rate(struct tb_port *port);
938 int usb4_usb3_port_allocated_bandwidth(struct tb_port *port, int *upstream_bw,
940 int usb4_usb3_port_allocate_bandwidth(struct tb_port *port, int *upstream_bw,
942 int usb4_usb3_port_release_bandwidth(struct tb_port *port, int *upstream_bw,