blob: d2a55ad2fd3e698045db391c14ae79d8a8d3f71e [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
* Thunderbolt driver - bus logic (NHI independent)
* Copyright (c) 2014 Andreas Noever <>
* 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 <linux/bitfield.h>
#include "tb_regs.h"
#include "ctl.h"
#include "dma_port.h"
/* Keep link controller awake during update */
/* Disable CLx if not supported */
#define QUIRK_NO_CLX BIT(1)
* 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
* @active_size: Size in bytes of the active NVM
* @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_start: Where the actual image starts after skipping
* possible headers
* @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
* @vops: Router vendor specific NVM operations (optional)
* The user of this structure needs to handle serialization of possible
* concurrent access.
struct tb_nvm {
struct device *dev;
u32 major;
u32 minor;
int id;
struct nvmem_device *active;
size_t active_size;
struct nvmem_device *non_active;
void *buf;
void *buf_data_start;
size_t buf_data_size;
bool authenticating;
bool flushed;
const struct tb_nvm_vendor_ops *vops;
enum tb_nvm_write_ops {
* enum tb_switch_tmu_mode - TMU mode
* @TB_SWITCH_TMU_MODE_LOWRES: Uni-directional, normal mode
* @TB_SWITCH_TMU_MODE_HIFI_UNI: Uni-directional, HiFi mode
* @TB_SWITCH_TMU_MODE_HIFI_BI: Bi-directional, HiFi mode
* @TB_SWITCH_TMU_MODE_MEDRES_ENHANCED_UNI: Enhanced Uni-directional, MedRes mode
* Ordering is based on TMU accuracy level (highest last).
enum tb_switch_tmu_mode {
* struct tb_switch_tmu - Structure holding router TMU configuration
* @cap: Offset to the TMU capability (%0 if not found)
* @has_ucap: Does the switch support uni-directional mode
* @mode: TMU mode related to the upstream router. Reflects the HW
* setting. Don't care for host router.
* @mode_request: TMU mode requested to set. Related to upstream router.
* Don't care for host router.
struct tb_switch_tmu {
int cap;
bool has_ucap;
enum tb_switch_tmu_mode mode;
enum tb_switch_tmu_mode mode_request;
* 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 upstream facing link
* @link_usb4: Upstream link is USB4
* @generation: Switch Thunderbolt generation
* @cap_plug_events: Offset to the plug events capability (%0 if not found)
* @cap_vsec_tmu: Offset to the TMU vendor specific capability (%0 if not found)
* @cap_lc: Offset to the link controller capability (%0 if not found)
* @cap_lp: Offset to the low power (CLx for TBT) 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
* @credit_allocation: Are the below buffer allocation parameters valid
* @max_usb3_credits: Router preferred number of buffers for USB 3.x
* @min_dp_aux_credits: Router preferred minimum number of buffers for DP AUX
* @min_dp_main_credits: Router preferred minimum number of buffers for DP MAIN
* @max_pcie_credits: Router preferred number of buffers for PCIe
* @max_dma_credits: Router preferred number of buffers for DMA/P2P
* @clx: CLx states on the upstream link of the router
* When the switch is being added or removed to the domain (other
* switches) you need to have domain lock held.
* In USB4 terminology this structure represents a router.
* Note @link_width is not the same as whether link is bonded or not.
* For Gen 4 links the link is also bonded when it is asymmetric. The
* correct way to find out whether the link is bonded or not is to look
* @bonded field of the upstream port.
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;
enum tb_link_width link_width;
bool link_usb4;
unsigned int generation;
int cap_plug_events;
int cap_vsec_tmu;
int cap_lc;
int cap_lp;
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;
bool credit_allocation;
unsigned int max_usb3_credits;
unsigned int min_dp_aux_credits;
unsigned int min_dp_main_credits;
unsigned int max_pcie_credits;
unsigned int max_dma_credits;
unsigned int clx;
* struct tb_bandwidth_group - Bandwidth management group
* @tb: Pointer to the domain the group belongs to
* @index: Index of the group (aka Group_ID). Valid values %1-%7
* @ports: DP IN adapters belonging to this group are linked here
* Any tunnel that requires isochronous bandwidth (that's DP for now) is
* attached to a bandwidth group. All tunnels going through the same
* USB4 links share the same group and can dynamically distribute the
* bandwidth within the group.
struct tb_bandwidth_group {
struct tb *tb;
int index;
struct list_head ports;
* 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)
* @usb4: Pointer to the USB4 port structure (only if @cap_usb4 is != %0)
* @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
* @total_credits: Total number of buffers available for this port
* @ctl_credits: Buffers reserved for control path
* @dma_credits: Number of credits allocated for DMA tunneling for all
* DMA paths through this port.
* @group: Bandwidth allocation group the adapter is assigned to. Only
* used for DP IN adapters for now.
* @group_list: The adapter is linked to the group's list of ports through this
* @max_bw: Maximum possible bandwidth through this adapter if set to
* non-zero.
* In USB4 terminology this structure represents an adapter (protocol or
* lane adapter).
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;
struct usb4_port *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;
unsigned int total_credits;
unsigned int ctl_credits;
unsigned int dma_credits;
struct tb_bandwidth_group *group;
struct list_head group_list;
unsigned int max_bw;
* struct usb4_port - USB4 port device
* @dev: Device for the port
* @port: Pointer to the lane 0 adapter
* @can_offline: Does the port have necessary platform support to moved
* it into offline mode and back
* @offline: The port is currently in offline mode
* @margining: Pointer to margining structure if enabled
struct usb4_port {
struct device dev;
struct tb_port *port;
bool can_offline;
bool offline;
struct tb_margining *margining;
* 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)
* @no_nvm_upgrade: Prevent NVM upgrade of this retimer
* @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;
bool no_nvm_upgrade;
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
* @nfc_credits: Number of non-flow controlled buffers allocated for the
* @in_port.
* 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;
unsigned int nfc_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 {
* struct tb_path - a unidirectional path between two ports
* @tb: Pointer to the domain structure
* @name: Name of the path (used for debugging)
* @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
* @alloc_hopid: Does this path consume port HopID
* 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;
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;
bool alloc_hopid;
/* HopIDs 0-7 are reserved by the Thunderbolt protocol */
* 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_USB4 BIT(2)
#define TB_WAKE_ON_USB3 BIT(3)
#define TB_WAKE_ON_PCIE BIT(4)
#define TB_WAKE_ON_DP BIT(5)
/* CL states */
#define TB_CL0S BIT(0)
#define TB_CL1 BIT(1)
#define TB_CL2 BIT(2)
* 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
* @disapprove_switch: Disapprove switch (disconnect PCIe tunnel)
* @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
* @usb4_switch_op: Optional proxy for USB4 router operations. If set
* this will be called whenever USB4 router operation is
* performed. If this returns %-EOPNOTSUPP then the
* native USB4 router operation is called.
* @usb4_switch_nvm_authenticate_status: Optional callback that the CM
* implementation can be used to
* return status of USB4 NVM_AUTH
* router operation.
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 (*disapprove_switch)(struct tb *tb, struct tb_switch *sw);
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 transmit_path, int transmit_ring,
int receive_path, int receive_ring);
int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd,
int transmit_path, int transmit_ring,
int receive_path, int receive_ring);
int (*usb4_switch_op)(struct tb_switch *sw, u16 opcode, u32 *metadata,
u8 *status, const void *tx_data, size_t tx_data_len,
void *rx_data, size_t rx_data_len);
int (*usb4_switch_nvm_authenticate_status)(struct tb_switch *sw,
u32 *status);
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,
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,
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,
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,
#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:%u: " 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;
extern struct device_type usb4_port_device_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, int timeout_msec, 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_disapprove_switch(struct tb *tb, struct tb_switch *sw);
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 transmit_path, int transmit_ring,
int receive_path, int receive_ring);
int tb_domain_disconnect_xdomain_paths(struct tb *tb, struct tb_xdomain *xd,
int transmit_path, int transmit_ring,
int receive_path, int receive_ring);
int tb_domain_disconnect_all_paths(struct tb *tb);
static inline struct tb *tb_domain_get(struct tb *tb)
if (tb)
return tb;
static inline void tb_domain_put(struct tb *tb)
struct tb_nvm *tb_nvm_alloc(struct device *dev);
int tb_nvm_read_version(struct tb_nvm *nvm);
int tb_nvm_validate(struct tb_nvm *nvm);
int tb_nvm_write_headers(struct tb_nvm *nvm);
int tb_nvm_add_active(struct tb_nvm *nvm, 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, nvmem_reg_write_t reg_write);
void tb_nvm_free(struct tb_nvm *nvm);
void tb_nvm_exit(void);
typedef int (*read_block_fn)(void *, unsigned int, void *, size_t);
typedef int (*write_block_fn)(void *, unsigned int, const void *, size_t);
int tb_nvm_read_data(unsigned int address, void *buf, size_t size,
unsigned int retries, read_block_fn read_block,
void *read_block_data);
int tb_nvm_write_data(unsigned int address, const void *buf, size_t size,
unsigned int retries, write_block_fn write_next_block,
void *write_block_data);
int tb_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
size_t size);
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_configuration_valid(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);
int tb_switch_wait_for_bit(struct tb_switch *sw, u32 offset, u32 bit,
u32 value, int timeout_msec);
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)
return sw;
static inline void tb_switch_put(struct tb_switch *sw)
static inline bool tb_is_switch(const struct device *dev)
return dev->type == &tb_switch_type;
static inline struct tb_switch *tb_to_switch(const 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);
* tb_switch_downstream_port() - Return downstream facing port of parent router
* @sw: Device router pointer
* Only call for device routers. Returns the downstream facing port of
* the parent router.
static inline struct tb_port *tb_switch_downstream_port(struct tb_switch *sw)
if (WARN_ON(!tb_route(sw)))
return NULL;
return tb_port_at(tb_route(sw), tb_switch_parent(sw));
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) {
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) {
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) {
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) {
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) {
return true;
return false;
* 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);
int tb_switch_tmu_configure(struct tb_switch *sw, enum tb_switch_tmu_mode mode);
* tb_switch_tmu_is_configured() - Is given TMU mode configured
* @sw: Router whose mode to check
* @mode: Mode to check
* Checks if given router TMU mode is configured to @mode. Note the
* router TMU might not be enabled to this mode.
static inline bool tb_switch_tmu_is_configured(const struct tb_switch *sw,
enum tb_switch_tmu_mode mode)
return sw->tmu.mode_request == mode;
* tb_switch_tmu_is_enabled() - Checks if the specified TMU mode is enabled
* @sw: Router whose TMU mode to check
* Return true if hardware TMU configuration matches the requested
* configuration (and is not %TB_SWITCH_TMU_MODE_OFF).
static inline bool tb_switch_tmu_is_enabled(const struct tb_switch *sw)
return sw->tmu.mode != TB_SWITCH_TMU_MODE_OFF &&
sw->tmu.mode == sw->tmu.mode_request;
bool tb_port_clx_is_enabled(struct tb_port *port, unsigned int clx);
int tb_switch_clx_init(struct tb_switch *sw);
bool tb_switch_clx_is_supported(const struct tb_switch *sw);
int tb_switch_clx_enable(struct tb_switch *sw, unsigned int clx);
int tb_switch_clx_disable(struct tb_switch *sw);
* tb_switch_clx_is_enabled() - Checks if the CLx is enabled
* @sw: Router to check for the CLx
* @clx: The CLx states to check for
* Checks if the specified CLx is enabled on the router upstream link.
* Returns true if any of the given states is enabled.
* Not applicable for a host router.
static inline bool tb_switch_clx_is_enabled(const struct tb_switch *sw,
unsigned int clx)
return sw->clx & clx;
int tb_switch_pcie_l1_enable(struct tb_switch *sw);
int tb_switch_xhci_connect(struct tb_switch *sw);
void tb_switch_xhci_disconnect(struct tb_switch *sw);
int tb_port_state(struct tb_port *port);
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_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);
static inline bool tb_port_use_credit_allocation(const struct tb_port *port)
return tb_port_is_null(port) && port->sw->credit_allocation;
* 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_port_get_link_width(struct tb_port *port);
int tb_port_set_link_width(struct tb_port *port, enum tb_link_width width);
int tb_port_lane_bonding_enable(struct tb_port *port);
void tb_port_lane_bonding_disable(struct tb_port *port);
int tb_port_wait_for_link_width(struct tb_port *port, unsigned int width_mask,
int timeout_msec);
int tb_port_update_credits(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,
bool alloc_hopid);
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);
* tb_path_for_each_hop() - Iterate over each hop on path
* @path: Path whose hops to iterate
* @hop: Hop used as iterator
* Iterates over each hop on path.
#define tb_path_for_each_hop(path, hop) \
for ((hop) = &(path)->hops[0]; \
(hop) <= &(path)->hops[(path)->path_length - 1]; (hop)++)
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_start_lane_initialization(struct tb_port *port);
bool tb_lc_is_clx_supported(struct tb_port *port);
bool tb_lc_is_usb_plugged(struct tb_port *port);
bool tb_lc_is_xhci_connected(struct tb_port *port);
int tb_lc_xhci_connect(struct tb_port *port);
void tb_lc_xhci_disconnect(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_is_xdomain_enabled(void);
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);
static inline struct tb_switch *tb_xdomain_parent(struct tb_xdomain *xd)
return tb_to_switch(xd->dev.parent);
* tb_xdomain_downstream_port() - Return downstream facing port of parent router
* @xd: Xdomain pointer
* Returns the downstream port the XDomain is connected to.
static inline struct tb_port *tb_xdomain_downstream_port(struct tb_xdomain *xd)
return tb_port_at(xd->route, tb_xdomain_parent(xd));
int tb_retimer_nvm_read(struct tb_retimer *rt, unsigned int address, void *buf,
size_t size);
int tb_retimer_scan(struct tb_port *port, bool add);
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;
* usb4_switch_version() - Returns USB4 version of the router
* @sw: Router to check
* Returns major version of USB4 router (%1 for v1, %2 for v2 and so
* on). Can be called to pre-USB4 router too and in that case returns %0.
static inline unsigned int usb4_switch_version(const struct tb_switch *sw)
return FIELD_GET(USB4_VERSION_MAJOR_MASK, sw->config.thunderbolt_version);
* 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 usb4_switch_version(sw) > 0;
int usb4_switch_setup(struct tb_switch *sw);
int usb4_switch_configuration_valid(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_set_offset(struct tb_switch *sw, unsigned int address);
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);
int usb4_switch_nvm_authenticate_status(struct tb_switch *sw, u32 *status);
int usb4_switch_credits_init(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_switch_add_ports(struct tb_switch *sw);
void usb4_switch_remove_ports(struct tb_switch *sw);
int usb4_port_unlock(struct tb_port *port);
int usb4_port_hotplug_enable(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, struct tb_xdomain *xd);
void usb4_port_unconfigure_xdomain(struct tb_port *port);
int usb4_port_router_offline(struct tb_port *port);
int usb4_port_router_online(struct tb_port *port);
int usb4_port_enumerate_retimers(struct tb_port *port);
bool usb4_port_clx_supported(struct tb_port *port);
int usb4_port_margining_caps(struct tb_port *port, u32 *caps);
int usb4_port_hw_margin(struct tb_port *port, unsigned int lanes,
unsigned int ber_level, bool timing, bool right_high,
u32 *results);
int usb4_port_sw_margin(struct tb_port *port, unsigned int lanes, bool timing,
bool right_high, u32 counter);
int usb4_port_sw_margin_errors(struct tb_port *port, u32 *errors);
int usb4_port_retimer_set_inbound_sbtx(struct tb_port *port, u8 index);
int usb4_port_retimer_unset_inbound_sbtx(struct tb_port *port, u8 index);
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_set_offset(struct tb_port *port, u8 index,
unsigned int address);
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);
int usb4_dp_port_set_cm_id(struct tb_port *port, int cm_id);
bool usb4_dp_port_bandwidth_mode_supported(struct tb_port *port);
bool usb4_dp_port_bandwidth_mode_enabled(struct tb_port *port);
int usb4_dp_port_set_cm_bandwidth_mode_supported(struct tb_port *port,
bool supported);
int usb4_dp_port_group_id(struct tb_port *port);
int usb4_dp_port_set_group_id(struct tb_port *port, int group_id);
int usb4_dp_port_nrd(struct tb_port *port, int *rate, int *lanes);
int usb4_dp_port_set_nrd(struct tb_port *port, int rate, int lanes);
int usb4_dp_port_granularity(struct tb_port *port);
int usb4_dp_port_set_granularity(struct tb_port *port, int granularity);
int usb4_dp_port_set_estimated_bandwidth(struct tb_port *port, int bw);
int usb4_dp_port_allocated_bandwidth(struct tb_port *port);
int usb4_dp_port_allocate_bandwidth(struct tb_port *port, int bw);
int usb4_dp_port_requested_bandwidth(struct tb_port *port);
int usb4_pci_port_set_ext_encapsulation(struct tb_port *port, bool enable);
static inline bool tb_is_usb4_port_device(const struct device *dev)
return dev->type == &usb4_port_device_type;
static inline struct usb4_port *tb_to_usb4_port_device(struct device *dev)
if (tb_is_usb4_port_device(dev))
return container_of(dev, struct usb4_port, dev);
return NULL;
struct usb4_port *usb4_port_device_add(struct tb_port *port);
void usb4_port_device_remove(struct usb4_port *usb4);
int usb4_port_device_resume(struct usb4_port *usb4);
static inline bool usb4_port_device_is_offline(const struct usb4_port *usb4)
return usb4->offline;
void tb_check_quirks(struct tb_switch *sw);
bool tb_acpi_add_links(struct tb_nhi *nhi);
bool tb_acpi_is_native(void);
bool tb_acpi_may_tunnel_usb3(void);
bool tb_acpi_may_tunnel_dp(void);
bool tb_acpi_may_tunnel_pcie(void);
bool tb_acpi_is_xdomain_allowed(void);
int tb_acpi_init(void);
void tb_acpi_exit(void);
int tb_acpi_power_on_retimers(struct tb_port *port);
int tb_acpi_power_off_retimers(struct tb_port *port);
static inline bool tb_acpi_add_links(struct tb_nhi *nhi) { return false; }
static inline bool tb_acpi_is_native(void) { return true; }
static inline bool tb_acpi_may_tunnel_usb3(void) { return true; }
static inline bool tb_acpi_may_tunnel_dp(void) { return true; }
static inline bool tb_acpi_may_tunnel_pcie(void) { return true; }
static inline bool tb_acpi_is_xdomain_allowed(void) { return true; }
static inline int tb_acpi_init(void) { return 0; }
static inline void tb_acpi_exit(void) { }
static inline int tb_acpi_power_on_retimers(struct tb_port *port) { return 0; }
static inline int tb_acpi_power_off_retimers(struct tb_port *port) { return 0; }
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);
void tb_xdomain_debugfs_init(struct tb_xdomain *xd);
void tb_xdomain_debugfs_remove(struct tb_xdomain *xd);
void tb_service_debugfs_init(struct tb_service *svc);
void tb_service_debugfs_remove(struct tb_service *svc);
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) { }
static inline void tb_xdomain_debugfs_init(struct tb_xdomain *xd) { }
static inline void tb_xdomain_debugfs_remove(struct tb_xdomain *xd) { }
static inline void tb_service_debugfs_init(struct tb_service *svc) { }
static inline void tb_service_debugfs_remove(struct tb_service *svc) { }