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WSL2-Linux-Kernel/drivers/thunderbolt/tb.h

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Thunderbolt driver - bus logic (NHI independent)
*
* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
* Copyright (C) 2018, Intel Corporation
*/
#ifndef TB_H_
#define TB_H_
#include <linux/nvmem-provider.h>
#include <linux/pci.h>
#include <linux/thunderbolt.h>
#include <linux/uuid.h>
#include "tb_regs.h"
#include "ctl.h"
#include "dma_port.h"
#define NVM_MIN_SIZE SZ_32K
#define NVM_MAX_SIZE SZ_512K
#define NVM_DATA_DWORDS 16
/* Intel specific NVM offsets */
#define NVM_DEVID 0x05
#define NVM_VERSION 0x08
#define NVM_FLASH_SIZE 0x45
/**
* struct tb_nvm - Structure holding NVM information
* @dev: Owner of the NVM
* @major: Major version number of the active NVM portion
* @minor: Minor version number of the active NVM portion
* @id: Identifier used with both NVM portions
* @active: Active portion NVMem device
* @non_active: Non-active portion NVMem device
* @buf: Buffer where the NVM image is stored before it is written to
* the actual NVM flash device
* @buf_data_size: Number of bytes actually consumed by the new NVM
* image
* @authenticating: The device is authenticating the new NVM
* @flushed: The image has been flushed to the storage area
*
* The user of this structure needs to handle serialization of possible
* concurrent access.
*/
struct tb_nvm {
struct device *dev;
u8 major;
u8 minor;
int id;
struct nvmem_device *active;
struct nvmem_device *non_active;
void *buf;
size_t buf_data_size;
bool authenticating;
bool flushed;
};
enum tb_nvm_write_ops {
WRITE_AND_AUTHENTICATE = 1,
WRITE_ONLY = 2,
AUTHENTICATE_ONLY = 3,
};
#define TB_SWITCH_KEY_SIZE 32
#define TB_SWITCH_MAX_DEPTH 6
#define USB4_SWITCH_MAX_DEPTH 5
/**
* enum tb_switch_tmu_rate - TMU refresh rate
* @TB_SWITCH_TMU_RATE_OFF: %0 (Disable Time Sync handshake)
* @TB_SWITCH_TMU_RATE_HIFI: %16 us time interval between successive
* transmission of the Delay Request TSNOS
* (Time Sync Notification Ordered Set) on a Link
* @TB_SWITCH_TMU_RATE_NORMAL: %1 ms time interval between successive
* transmission of the Delay Request TSNOS on
* a Link
*/
enum tb_switch_tmu_rate {
TB_SWITCH_TMU_RATE_OFF = 0,
TB_SWITCH_TMU_RATE_HIFI = 16,
TB_SWITCH_TMU_RATE_NORMAL = 1000,
};
/**
* struct tb_switch_tmu - Structure holding switch TMU configuration
* @cap: Offset to the TMU capability (%0 if not found)
* @has_ucap: Does the switch support uni-directional mode
* @rate: TMU refresh rate related to upstream switch. In case of root
* switch this holds the domain rate. Reflects the HW setting.
* @unidirectional: Is the TMU in uni-directional or bi-directional mode
* related to upstream switch. Don't care for root switch.
* Reflects the HW setting.
* @unidirectional_request: Is the new TMU mode: uni-directional or bi-directional
* that is requested to be set. Related to upstream switch.
* Don't care for root switch.
* @rate_request: TMU new refresh rate related to upstream switch that is
* requested to be set. In case of root switch, this holds
* the new domain rate that is requested to be set.
*/
struct tb_switch_tmu {
int cap;
bool has_ucap;
enum tb_switch_tmu_rate rate;
bool unidirectional;
bool unidirectional_request;
enum tb_switch_tmu_rate rate_request;
};
enum tb_clx {
TB_CLX_DISABLE,
TB_CL0S,
TB_CL1,
TB_CL2,
};
/**
* struct tb_switch - a thunderbolt switch
* @dev: Device for the switch
* @config: Switch configuration
* @ports: Ports in this switch
* @dma_port: If the switch has port supporting DMA configuration based
* mailbox this will hold the pointer to that (%NULL
* otherwise). If set it also means the switch has
* upgradeable NVM.
* @tmu: The switch TMU configuration
* @tb: Pointer to the domain the switch belongs to
* @uid: Unique ID of the switch
* @uuid: UUID of the switch (or %NULL if not supported)
* @vendor: Vendor ID of the switch
* @device: Device ID of the switch
* @vendor_name: Name of the vendor (or %NULL if not known)
* @device_name: Name of the device (or %NULL if not known)
* @link_speed: Speed of the link in Gb/s
* @link_width: Width of the link (1 or 2)
* @link_usb4: Upstream link is USB4
* @generation: Switch Thunderbolt generation
* @cap_plug_events: Offset to the plug events capability (%0 if not found)
* @cap_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 state 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.
*/
struct tb_switch {
struct device dev;
struct tb_regs_switch_header config;
struct tb_port *ports;
struct tb_dma_port *dma_port;
struct tb_switch_tmu tmu;
struct tb *tb;
u64 uid;
uuid_t *uuid;
u16 vendor;
u16 device;
const char *vendor_name;
const char *device_name;
unsigned int link_speed;
unsigned int link_width;
bool link_usb4;
unsigned int generation;
int cap_plug_events;
int cap_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;
enum tb_clx clx;
};
/**
* 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.
*
* 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 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
*/
struct usb4_port {
struct device dev;
struct tb_port *port;
bool can_offline;
bool offline;
};
/**
* tb_retimer: Thunderbolt retimer
* @dev: Device for the retimer
* @tb: Pointer to the domain the retimer belongs to
* @index: Retimer index facing the router USB4 port
* @vendor: Vendor ID of the retimer
* @device: Device ID of the retimer
* @port: Pointer to the lane 0 adapter
* @nvm: Pointer to the NVM if the retimer has one (%NULL otherwise)
* @auth_status: Status of last NVM authentication
*/
struct tb_retimer {
struct device dev;
struct tb *tb;
u8 index;
u32 vendor;
u32 device;
struct tb_port *port;
struct tb_nvm *nvm;
u32 auth_status;
};
/**
* struct tb_path_hop - routing information for a tb_path
* @in_port: Ingress port of a switch
* @out_port: Egress port of a switch where the packet is routed out
* (must be on the same switch than @in_port)
* @in_hop_index: HopID where the path configuration entry is placed in
* the path config space of @in_port.
* @in_counter_index: Used counter index (not used in the driver
* currently, %-1 to disable)
* @next_hop_index: HopID of the packet when it is routed out from @out_port
* @initial_credits: Number of initial flow control credits allocated for
* the path
* @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 {
TB_PATH_NONE = 0,
TB_PATH_SOURCE = 1,
TB_PATH_INTERNAL = 2,
TB_PATH_DESTINATION = 4,
TB_PATH_ALL = 7,
};
/**
* struct tb_path - a unidirectional path between two ports
* @tb: Pointer to the domain structure
* @name: Name of the path (used for debugging)
* @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 */
#define TB_PATH_MIN_HOPID 8
/*
* Support paths from the farthest (depth 6) router to the host and back
* to the same level (not necessarily to the same router).
*/
#define TB_PATH_MAX_HOPS (7 * 2)
/* Possible wake types */
#define TB_WAKE_ON_CONNECT BIT(0)
#define TB_WAKE_ON_DISCONNECT BIT(1)
#define TB_WAKE_ON_USB4 BIT(2)
#define TB_WAKE_ON_USB3 BIT(3)
#define TB_WAKE_ON_PCIE BIT(4)
#define TB_WAKE_ON_DP BIT(5)
/**
* 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,
buffer,
tb_route(sw),
0,
space,
offset,
length);
}
static inline int tb_sw_write(struct tb_switch *sw, const void *buffer,
enum tb_cfg_space space, u32 offset, u32 length)
{
if (sw->is_unplugged)
return -ENODEV;
return tb_cfg_write(sw->tb->ctl,
buffer,
tb_route(sw),
0,
space,
offset,
length);
}
static inline int tb_port_read(struct tb_port *port, void *buffer,
enum tb_cfg_space space, u32 offset, u32 length)
{
if (port->sw->is_unplugged)
return -ENODEV;
return tb_cfg_read(port->sw->tb->ctl,
buffer,
tb_route(port->sw),
port->port,
space,
offset,
length);
}
static inline int tb_port_write(struct tb_port *port, const void *buffer,
enum tb_cfg_space space, u32 offset, u32 length)
{
if (port->sw->is_unplugged)
return -ENODEV;
return tb_cfg_write(port->sw->tb->ctl,
buffer,
tb_route(port->sw),
port->port,
space,
offset,
length);
}
#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define tb_dbg(tb, fmt, arg...) dev_dbg(&(tb)->nhi->pdev->dev, fmt, ## arg)
#define __TB_SW_PRINT(level, sw, fmt, arg...) \
do { \
const struct tb_switch *__sw = (sw); \
level(__sw->tb, "%llx: " fmt, \
tb_route(__sw), ## arg); \
} while (0)
#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
#define tb_sw_dbg(sw, fmt, arg...) __TB_SW_PRINT(tb_dbg, sw, fmt, ##arg)
#define __TB_PORT_PRINT(level, _port, fmt, arg...) \
do { \
const struct tb_port *__port = (_port); \
level(__port->sw->tb, "%llx:%x: " fmt, \
tb_route(__port->sw), __port->port, ## arg); \
} while (0)
#define tb_port_WARN(port, fmt, arg...) \
__TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
#define tb_port_warn(port, fmt, arg...) \
__TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
#define tb_port_info(port, fmt, arg...) \
__TB_PORT_PRINT(tb_info, port, fmt, ##arg)
#define tb_port_dbg(port, fmt, arg...) \
__TB_PORT_PRINT(tb_dbg, port, fmt, ##arg)
struct tb *icm_probe(struct tb_nhi *nhi);
struct tb *tb_probe(struct tb_nhi *nhi);
extern struct device_type tb_domain_type;
extern struct device_type tb_retimer_type;
extern struct device_type tb_switch_type;
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)
get_device(&tb->dev);
return tb;
}
static inline void tb_domain_put(struct tb *tb)
{
put_device(&tb->dev);
}
struct tb_nvm *tb_nvm_alloc(struct device *dev);
int tb_nvm_add_active(struct tb_nvm *nvm, size_t size, nvmem_reg_read_t reg_read);
int tb_nvm_write_buf(struct tb_nvm *nvm, unsigned int offset, void *val,
size_t bytes);
int tb_nvm_add_non_active(struct tb_nvm *nvm, size_t size,
nvmem_reg_write_t reg_write);
void tb_nvm_free(struct tb_nvm *nvm);
void tb_nvm_exit(void);
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);
struct tb_switch *tb_switch_alloc(struct tb *tb, struct device *parent,
u64 route);
struct tb_switch *tb_switch_alloc_safe_mode(struct tb *tb,
struct device *parent, u64 route);
int tb_switch_configure(struct tb_switch *sw);
int tb_switch_add(struct tb_switch *sw);
void tb_switch_remove(struct tb_switch *sw);
void tb_switch_suspend(struct tb_switch *sw, bool runtime);
int tb_switch_resume(struct tb_switch *sw);
int tb_switch_reset(struct tb_switch *sw);
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)
get_device(&sw->dev);
return sw;
}
static inline void tb_switch_put(struct tb_switch *sw)
{
put_device(&sw->dev);
}
static inline bool tb_is_switch(const struct device *dev)
{
return dev->type == &tb_switch_type;
}
static inline struct tb_switch *tb_to_switch(struct device *dev)
{
if (tb_is_switch(dev))
return container_of(dev, struct tb_switch, dev);
return NULL;
}
static inline struct tb_switch *tb_switch_parent(struct tb_switch *sw)
{
return tb_to_switch(sw->dev.parent);
}
static inline bool tb_switch_is_light_ridge(const struct tb_switch *sw)
{
return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&
sw->config.device_id == PCI_DEVICE_ID_INTEL_LIGHT_RIDGE;
}
static inline bool tb_switch_is_eagle_ridge(const struct tb_switch *sw)
{
return sw->config.vendor_id == PCI_VENDOR_ID_INTEL &&
sw->config.device_id == PCI_DEVICE_ID_INTEL_EAGLE_RIDGE;
}
static inline bool tb_switch_is_cactus_ridge(const struct tb_switch *sw)
{
if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
switch (sw->config.device_id) {
case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_2C:
case PCI_DEVICE_ID_INTEL_CACTUS_RIDGE_4C:
return true;
}
}
return false;
}
static inline bool tb_switch_is_falcon_ridge(const struct tb_switch *sw)
{
if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
switch (sw->config.device_id) {
case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_2C_BRIDGE:
case PCI_DEVICE_ID_INTEL_FALCON_RIDGE_4C_BRIDGE:
return true;
}
}
return false;
}
static inline bool tb_switch_is_alpine_ridge(const struct tb_switch *sw)
{
if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
switch (sw->config.device_id) {
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_2C_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_LP_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_4C_BRIDGE:
case PCI_DEVICE_ID_INTEL_ALPINE_RIDGE_C_2C_BRIDGE:
return true;
}
}
return false;
}
static inline bool tb_switch_is_titan_ridge(const struct tb_switch *sw)
{
if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
switch (sw->config.device_id) {
case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_2C_BRIDGE:
case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_4C_BRIDGE:
case PCI_DEVICE_ID_INTEL_TITAN_RIDGE_DD_BRIDGE:
return true;
}
}
return false;
}
static inline bool tb_switch_is_tiger_lake(const struct tb_switch *sw)
{
if (sw->config.vendor_id == PCI_VENDOR_ID_INTEL) {
switch (sw->config.device_id) {
case PCI_DEVICE_ID_INTEL_TGL_NHI0:
case PCI_DEVICE_ID_INTEL_TGL_NHI1:
case PCI_DEVICE_ID_INTEL_TGL_H_NHI0:
case PCI_DEVICE_ID_INTEL_TGL_H_NHI1:
return true;
}
}
return false;
}
/**
* tb_switch_is_usb4() - Is the switch USB4 compliant
* @sw: Switch to check
*
* Returns true if the @sw is USB4 compliant router, false otherwise.
*/
static inline bool tb_switch_is_usb4(const struct tb_switch *sw)
{
return sw->config.thunderbolt_version == USB4_VERSION_1_0;
}
/**
* tb_switch_is_icm() - Is the switch handled by ICM firmware
* @sw: Switch to check
*
* In case there is a need to differentiate whether ICM firmware or SW CM
* is handling @sw this function can be called. It is valid to call this
* after tb_switch_alloc() and tb_switch_configure() has been called
* (latter only for SW CM case).
*/
static inline bool tb_switch_is_icm(const struct tb_switch *sw)
{
return !sw->config.enabled;
}
int tb_switch_lane_bonding_enable(struct tb_switch *sw);
void tb_switch_lane_bonding_disable(struct tb_switch *sw);
int tb_switch_configure_link(struct tb_switch *sw);
void tb_switch_unconfigure_link(struct tb_switch *sw);
bool tb_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in);
int tb_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
void tb_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in);
int tb_switch_tmu_init(struct tb_switch *sw);
int tb_switch_tmu_post_time(struct tb_switch *sw);
int tb_switch_tmu_disable(struct tb_switch *sw);
int tb_switch_tmu_enable(struct tb_switch *sw);
void tb_switch_tmu_configure(struct tb_switch *sw,
enum tb_switch_tmu_rate rate,
bool unidirectional);
/**
* tb_switch_tmu_hifi_is_enabled() - Checks if the specified TMU mode is enabled
* @sw: Router whose TMU mode to check
* @unidirectional: If uni-directional (bi-directional otherwise)
*
* Return true if hardware TMU configuration matches the one passed in
* as parameter. That is HiFi and either uni-directional or bi-directional.
*/
static inline bool tb_switch_tmu_hifi_is_enabled(const struct tb_switch *sw,
bool unidirectional)
{
return sw->tmu.rate == TB_SWITCH_TMU_RATE_HIFI &&
sw->tmu.unidirectional == unidirectional;
}
int tb_switch_enable_clx(struct tb_switch *sw, enum tb_clx clx);
int tb_switch_disable_clx(struct tb_switch *sw, enum tb_clx clx);
/**
* tb_switch_is_clx_enabled() - Checks if the CLx is enabled
* @sw: Router to check the CLx state for
*
* Checks if the CLx is enabled on the router upstream link.
* Not applicable for a host router.
*/
static inline bool tb_switch_is_clx_enabled(const struct tb_switch *sw)
{
return sw->clx != TB_CLX_DISABLE;
}
/**
* tb_switch_is_cl0s_enabled() - Checks if the CL0s is enabled
* @sw: Router to check for the CL0s
*
* Checks if the CL0s is enabled on the router upstream link.
* Not applicable for a host router.
*/
static inline bool tb_switch_is_cl0s_enabled(const struct tb_switch *sw)
{
return sw->clx == TB_CL0S;
}
/**
* tb_switch_is_clx_supported() - Is CLx supported on this type of router
* @sw: The router to check CLx support for
*/
static inline bool tb_switch_is_clx_supported(const struct tb_switch *sw)
{
return tb_switch_is_usb4(sw) || tb_switch_is_titan_ridge(sw);
}
int tb_switch_mask_clx_objections(struct tb_switch *sw);
int tb_switch_pcie_l1_enable(struct tb_switch *sw);
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_state(struct tb_port *port);
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, int width,
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);
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);
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;
}
int usb4_switch_setup(struct tb_switch *sw);
int usb4_switch_read_uid(struct tb_switch *sw, u64 *uid);
int usb4_switch_drom_read(struct tb_switch *sw, unsigned int address, void *buf,
size_t size);
bool usb4_switch_lane_bonding_possible(struct tb_switch *sw);
int usb4_switch_set_wake(struct tb_switch *sw, unsigned int flags);
int usb4_switch_set_sleep(struct tb_switch *sw);
int usb4_switch_nvm_sector_size(struct tb_switch *sw);
int usb4_switch_nvm_read(struct tb_switch *sw, unsigned int address, void *buf,
size_t size);
int usb4_switch_nvm_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_configure(struct tb_port *port);
void usb4_port_unconfigure(struct tb_port *port);
int usb4_port_configure_xdomain(struct tb_port *port);
void usb4_port_unconfigure_xdomain(struct tb_port *port);
int usb4_port_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_retimer_set_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);
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);
/* Keep link controller awake during update */
#define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0)
void tb_check_quirks(struct tb_switch *sw);
#ifdef CONFIG_ACPI
void tb_acpi_add_links(struct tb_nhi *nhi);
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);
#else
static inline void tb_acpi_add_links(struct tb_nhi *nhi) { }
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; }
#endif
#ifdef CONFIG_DEBUG_FS
void tb_debugfs_init(void);
void tb_debugfs_exit(void);
void tb_switch_debugfs_init(struct tb_switch *sw);
void tb_switch_debugfs_remove(struct tb_switch *sw);
void tb_service_debugfs_init(struct tb_service *svc);
void tb_service_debugfs_remove(struct tb_service *svc);
#else
static inline void tb_debugfs_init(void) { }
static inline void tb_debugfs_exit(void) { }
static inline void tb_switch_debugfs_init(struct tb_switch *sw) { }
static inline void tb_switch_debugfs_remove(struct tb_switch *sw) { }
static inline void tb_service_debugfs_init(struct tb_service *svc) { }
static inline void tb_service_debugfs_remove(struct tb_service *svc) { }
#endif
#ifdef CONFIG_USB4_KUNIT_TEST
int tb_test_init(void);
void tb_test_exit(void);
#else
static inline int tb_test_init(void) { return 0; }
static inline void tb_test_exit(void) { }
#endif
#endif
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