[mirror_ubuntu-bionic-kernel.git] / drivers / thunderbolt / tb.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Thunderbolt Cactus Ridge driver - bus logic (NHI independent)
 *
 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
 */

#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"

/**
 * struct tb_switch_nvm - Structure holding switch NVM information
 * @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 switch is authenticating the new NVM
 */
struct tb_switch_nvm {
	u8 major;
	u8 minor;
	int id;
	struct nvmem_device *active;
	struct nvmem_device *non_active;
	void *buf;
	size_t buf_data_size;
	bool authenticating;
};

#define TB_SWITCH_KEY_SIZE		32

/**
 * 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.
 * @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)
 * @generation: Switch Thunderbolt generation
 * @cap_plug_events: Offset to the plug events 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
 * @authorized: Whether the switch is authorized by user or policy
 * @work: Work used to automatically authorize a switch
 * @security_level: Switch supported security level
 * @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)
 *
 * When the switch is being added or removed to the domain (other
 * switches) you need to have domain lock held. For switch authorization
 * internal switch_lock is enough.
 */
struct tb_switch {
	struct device dev;
	struct tb_regs_switch_header config;
	struct tb_port *ports;
	struct tb_dma_port *dma_port;
	struct tb *tb;
	u64 uid;
	uuid_t *uuid;
	u16 vendor;
	u16 device;
	const char *vendor_name;
	const char *device_name;
	unsigned int generation;
	int cap_plug_events;
	bool is_unplugged;
	u8 *drom;
	struct tb_switch_nvm *nvm;
	bool no_nvm_upgrade;
	bool safe_mode;
	unsigned int authorized;
	struct work_struct work;
	enum tb_security_level security_level;
	u8 *key;
	u8 connection_id;
	u8 connection_key;
	u8 link;
	u8 depth;
};

/**
 * 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
 * @port: Port number on switch
 * @disabled: Disabled by eeprom
 * @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.
 */
struct tb_port {
	struct tb_regs_port_header config;
	struct tb_switch *sw;
	struct tb_port *remote;
	struct tb_xdomain *xdomain;
	int cap_phy;
	u8 port;
	bool disabled;
	struct tb_port *dual_link_port;
	u8 link_nr:1;
};

/**
 * struct tb_path_hop - routing information for a tb_path
 *
 * Hop configuration is always done on the IN port of a switch.
 * in_port and out_port have to be on the same switch. Packets arriving on
 * in_port with "hop" = in_hop_index will get routed to through out_port. The
 * next hop to take (on out_port->remote) is determined by next_hop_index.
 *
 * 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; /* write -1 to disable counters for this hop. */
	int next_hop_index;
};

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

/**
 * struct tb_path - a unidirectional path between two ports
 *
 * A path consists of a number of hops (see 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;
	int nfc_credits; /* non flow controlled credits */
	enum tb_path_port ingress_shared_buffer;
	enum tb_path_port egress_shared_buffer;
	enum tb_path_port ingress_fc_enable;
	enum tb_path_port egress_fc_enable;

	int priority:3;
	int weight:4;
	bool drop_packages;
	bool activated;
	struct tb_path_hop *hops;
	int path_length; /* number of hops */
};

/**
 * 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
 * @complete: Connection manager specific complete
 * @handle_event: Handle thunderbolt event
 * @approve_switch: Approve switch
 * @add_switch_key: Add key to switch
 * @challenge_switch_key: Challenge switch using key
 * @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
 * @approve_xdomain_paths: Approve (establish) XDomain DMA paths
 * @disconnect_xdomain_paths: Disconnect XDomain DMA paths
 */
struct tb_cm_ops {
	int (*driver_ready)(struct tb *tb);
	int (*start)(struct tb *tb);
	void (*stop)(struct tb *tb);
	int (*suspend_noirq)(struct tb *tb);
	int (*resume_noirq)(struct tb *tb);
	int (*suspend)(struct tb *tb);
	void (*complete)(struct tb *tb);
	void (*handle_event)(struct tb *tb, enum tb_cfg_pkg_type,
			     const void *buf, size_t size);
	int (*approve_switch)(struct tb *tb, struct tb_switch *sw);
	int (*add_switch_key)(struct tb *tb, struct tb_switch *sw);
	int (*challenge_switch_key)(struct tb *tb, struct tb_switch *sw,
				    const u8 *challenge, u8 *response);
	int (*disconnect_pcie_paths)(struct tb *tb);
	int (*approve_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
	int (*disconnect_xdomain_paths)(struct tb *tb, struct tb_xdomain *xd);
};

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

/* 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];
}

static inline u64 tb_route(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];
}

static inline int tb_sw_read(struct tb_switch *sw, void *buffer,
			     enum tb_cfg_space space, u32 offset, u32 length)
{
	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, void *buffer,
			      enum tb_cfg_space space, u32 offset, u32 length)
{
	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)
{
	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)
{
	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_SW_PRINT(level, sw, fmt, arg...)           \
	do {                                            \
		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_PORT_PRINT(level, _port, fmt, arg...)                      \
	do {                                                            \
		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)

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_switch_type;

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

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

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

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);
int tb_switch_resume(struct tb_switch *sw);
int tb_switch_reset(struct tb *tb, u64 route);
void tb_sw_set_unplugged(struct tb_switch *sw);
struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route);
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);

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;
}

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_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);

struct tb_path *tb_path_alloc(struct tb *tb, int num_hops);
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);

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


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

static inline bool tb_is_upstream_port(struct tb_port *port)
{
	return port == tb_upstream_port(port->sw);
}

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

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

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
d6cc51cd AN	2	/*
	3	* Thunderbolt Cactus Ridge driver - bus logic (NHI independent)
	4	*
	5	* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
	6	*/
	7
	8	#ifndef TB_H_
	9	#define TB_H_
	10
e6b245cc	11	#include <linux/nvmem-provider.h>
a25c8b2f	12	#include <linux/pci.h>
d1ff7024	13	#include <linux/thunderbolt.h>
bfe778ac	14	#include <linux/uuid.h>
a25c8b2f AN	15
a25c8b2f AN	16	#include "tb_regs.h"
d6cc51cd	17	#include "ctl.h"
3e136768	18	#include "dma_port.h"
d6cc51cd	19
e6b245cc MW	20	/**
	21	* struct tb_switch_nvm - Structure holding switch NVM information
	22	* @major: Major version number of the active NVM portion
	23	* @minor: Minor version number of the active NVM portion
	24	* @id: Identifier used with both NVM portions
	25	* @active: Active portion NVMem device
	26	* @non_active: Non-active portion NVMem device
	27	* @buf: Buffer where the NVM image is stored before it is written to
	28	* the actual NVM flash device
	29	* @buf_data_size: Number of bytes actually consumed by the new NVM
	30	* image
	31	* @authenticating: The switch is authenticating the new NVM
	32	*/
	33	struct tb_switch_nvm {
	34	u8 major;
	35	u8 minor;
	36	int id;
	37	struct nvmem_device *active;
	38	struct nvmem_device *non_active;
	39	void *buf;
	40	size_t buf_data_size;
	41	bool authenticating;
	42	};
	43
f67cf491	44	#define TB_SWITCH_KEY_SIZE 32
f67cf491	45
a25c8b2f AN	46	/**
a25c8b2f AN	47	* struct tb_switch - a thunderbolt switch
bfe778ac MW	48	* @dev: Device for the switch
	49	* @config: Switch configuration
	50	* @ports: Ports in this switch
3e136768 MW	51	* @dma_port: If the switch has port supporting DMA configuration based
3e136768 MW	52	* mailbox this will hold the pointer to that (%NULL
e6b245cc MW	53	* otherwise). If set it also means the switch has
e6b245cc MW	54	* upgradeable NVM.
bfe778ac MW	55	* @tb: Pointer to the domain the switch belongs to
	56	* @uid: Unique ID of the switch
	57	* @uuid: UUID of the switch (or %NULL if not supported)
	58	* @vendor: Vendor ID of the switch
	59	* @device: Device ID of the switch
72ee3390 MW	60	* @vendor_name: Name of the vendor (or %NULL if not known)
72ee3390 MW	61	* @device_name: Name of the device (or %NULL if not known)
2c3c4197	62	* @generation: Switch Thunderbolt generation
bfe778ac MW	63	* @cap_plug_events: Offset to the plug events capability (%0 if not found)
	64	* @is_unplugged: The switch is going away
	65	* @drom: DROM of the switch (%NULL if not found)
e6b245cc MW	66	* @nvm: Pointer to the NVM if the switch has one (%NULL otherwise)
	67	* @no_nvm_upgrade: Prevent NVM upgrade of this switch
	68	* @safe_mode: The switch is in safe-mode
f67cf491 MW	69	* @authorized: Whether the switch is authorized by user or policy
	70	* @work: Work used to automatically authorize a switch
	71	* @security_level: Switch supported security level
	72	* @key: Contains the key used to challenge the device or %NULL if not
	73	* supported. Size of the key is %TB_SWITCH_KEY_SIZE.
	74	* @connection_id: Connection ID used with ICM messaging
	75	* @connection_key: Connection key used with ICM messaging
	76	* @link: Root switch link this switch is connected (ICM only)
	77	* @depth: Depth in the chain this switch is connected (ICM only)
	78	*
	79	* When the switch is being added or removed to the domain (other
	80	* switches) you need to have domain lock held. For switch authorization
	81	* internal switch_lock is enough.
a25c8b2f AN	82	*/
a25c8b2f AN	83	struct tb_switch {
bfe778ac	84	struct device dev;
a25c8b2f AN	85	struct tb_regs_switch_header config;
a25c8b2f AN	86	struct tb_port *ports;
3e136768	87	struct tb_dma_port *dma_port;
a25c8b2f	88	struct tb *tb;
c90553b3	89	u64 uid;
7c39ffe7	90	uuid_t *uuid;
bfe778ac MW	91	u16 vendor;
bfe778ac MW	92	u16 device;
72ee3390 MW	93	const char *vendor_name;
72ee3390 MW	94	const char *device_name;
2c3c4197	95	unsigned int generation;
bfe778ac MW	96	int cap_plug_events;
bfe778ac MW	97	bool is_unplugged;
cd22e73b	98	u8 *drom;
e6b245cc MW	99	struct tb_switch_nvm *nvm;
	100	bool no_nvm_upgrade;
	101	bool safe_mode;
f67cf491 MW	102	unsigned int authorized;
	103	struct work_struct work;
	104	enum tb_security_level security_level;
	105	u8 *key;
	106	u8 connection_id;
	107	u8 connection_key;
	108	u8 link;
	109	u8 depth;
a25c8b2f AN	110	};
	111
	112	/**
	113	* struct tb_port - a thunderbolt port, part of a tb_switch
d1ff7024 MW	114	* @config: Cached port configuration read from registers
	115	* @sw: Switch the port belongs to
	116	* @remote: Remote port (%NULL if not connected)
	117	* @xdomain: Remote host (%NULL if not connected)
	118	* @cap_phy: Offset, zero if not found
	119	* @port: Port number on switch
	120	* @disabled: Disabled by eeprom
	121	* @dual_link_port: If the switch is connected using two ports, points
	122	* to the other port.
	123	* @link_nr: Is this primary or secondary port on the dual_link.
a25c8b2f AN	124	*/
	125	struct tb_port {
	126	struct tb_regs_port_header config;
	127	struct tb_switch *sw;
d1ff7024 MW	128	struct tb_port *remote;
	129	struct tb_xdomain *xdomain;
	130	int cap_phy;
	131	u8 port;
	132	bool disabled;
cd22e73b AN	133	struct tb_port *dual_link_port;
cd22e73b AN	134	u8 link_nr:1;
a25c8b2f AN	135	};
a25c8b2f AN	136
520b6702 AN	137	/**
	138	* struct tb_path_hop - routing information for a tb_path
	139	*
	140	* Hop configuration is always done on the IN port of a switch.
	141	* in_port and out_port have to be on the same switch. Packets arriving on
	142	* in_port with "hop" = in_hop_index will get routed to through out_port. The
	143	* next hop to take (on out_port->remote) is determined by next_hop_index.
	144	*
	145	* in_counter_index is the index of a counter (in TB_CFG_COUNTERS) on the in
	146	* port.
	147	*/
	148	struct tb_path_hop {
	149	struct tb_port *in_port;
	150	struct tb_port *out_port;
	151	int in_hop_index;
	152	int in_counter_index; /* write -1 to disable counters for this hop. */
	153	int next_hop_index;
	154	};
	155
	156	/**
	157	* enum tb_path_port - path options mask
	158	*/
	159	enum tb_path_port {
	160	TB_PATH_NONE = 0,
	161	TB_PATH_SOURCE = 1, /* activate on the first hop (out of src) */
	162	TB_PATH_INTERNAL = 2, /* activate on other hops (not the first/last) */
	163	TB_PATH_DESTINATION = 4, /* activate on the last hop (into dst) */
	164	TB_PATH_ALL = 7,
	165	};
	166
	167	/**
	168	* struct tb_path - a unidirectional path between two ports
	169	*
	170	* A path consists of a number of hops (see tb_path_hop). To establish a PCIe
	171	* tunnel two paths have to be created between the two PCIe ports.
	172	*
	173	*/
	174	struct tb_path {
	175	struct tb *tb;
	176	int nfc_credits; /* non flow controlled credits */
	177	enum tb_path_port ingress_shared_buffer;
	178	enum tb_path_port egress_shared_buffer;
	179	enum tb_path_port ingress_fc_enable;
	180	enum tb_path_port egress_fc_enable;
	181
	182	int priority:3;
	183	int weight:4;
	184	bool drop_packages;
	185	bool activated;
	186	struct tb_path_hop *hops;
	187	int path_length; /* number of hops */
	188	};
	189
9d3cce0b MW	190	/**
9d3cce0b MW	191	* struct tb_cm_ops - Connection manager specific operations vector
f67cf491 MW	192	* @driver_ready: Called right after control channel is started. Used by
f67cf491 MW	193	* ICM to send driver ready message to the firmware.
9d3cce0b MW	194	* @start: Starts the domain
	195	* @stop: Stops the domain
	196	* @suspend_noirq: Connection manager specific suspend_noirq
	197	* @resume_noirq: Connection manager specific resume_noirq
f67cf491 MW	198	* @suspend: Connection manager specific suspend
f67cf491 MW	199	* @complete: Connection manager specific complete
81a54b5e	200	* @handle_event: Handle thunderbolt event
f67cf491 MW	201	* @approve_switch: Approve switch
	202	* @add_switch_key: Add key to switch
	203	* @challenge_switch_key: Challenge switch using key
e6b245cc	204	* @disconnect_pcie_paths: Disconnects PCIe paths before NVM update
d1ff7024 MW	205	* @approve_xdomain_paths: Approve (establish) XDomain DMA paths
d1ff7024 MW	206	* @disconnect_xdomain_paths: Disconnect XDomain DMA paths
9d3cce0b MW	207	*/
9d3cce0b MW	208	struct tb_cm_ops {
f67cf491	209	int (driver_ready)(struct tb tb);
9d3cce0b MW	210	int (start)(struct tb tb);
	211	void (stop)(struct tb tb);
	212	int (suspend_noirq)(struct tb tb);
	213	int (resume_noirq)(struct tb tb);
f67cf491 MW	214	int (suspend)(struct tb tb);
f67cf491 MW	215	void (complete)(struct tb tb);
81a54b5e MW	216	void (handle_event)(struct tb tb, enum tb_cfg_pkg_type,
81a54b5e MW	217	const void *buf, size_t size);
f67cf491 MW	218	int (approve_switch)(struct tb tb, struct tb_switch *sw);
	219	int (add_switch_key)(struct tb tb, struct tb_switch *sw);
	220	int (challenge_switch_key)(struct tb tb, struct tb_switch *sw,
	221	const u8 challenge, u8 response);
e6b245cc	222	int (disconnect_pcie_paths)(struct tb tb);
d1ff7024 MW	223	int (approve_xdomain_paths)(struct tb tb, struct tb_xdomain *xd);
d1ff7024 MW	224	int (disconnect_xdomain_paths)(struct tb tb, struct tb_xdomain *xd);
9d3cce0b	225	};
520b6702	226
9d3cce0b MW	227	static inline void tb_priv(struct tb tb)
	228	{
	229	return (void *)tb->privdata;
	230	}
	231
a25c8b2f AN	232	/* helper functions & macros */
	233
	234	/**
	235	* tb_upstream_port() - return the upstream port of a switch
	236	*
	237	* Every switch has an upstream port (for the root switch it is the NHI).
	238	*
	239	* During switch alloc/init tb_upstream_port()->remote may be NULL, even for
	240	* non root switches (on the NHI port remote is always NULL).
	241	*
	242	* Return: Returns the upstream port of the switch.
	243	*/
	244	static inline struct tb_port tb_upstream_port(struct tb_switch sw)
	245	{
	246	return &sw->ports[sw->config.upstream_port_number];
	247	}
	248
	249	static inline u64 tb_route(struct tb_switch *sw)
	250	{
	251	return ((u64) sw->config.route_hi) << 32 \| sw->config.route_lo;
	252	}
	253
f67cf491 MW	254	static inline struct tb_port tb_port_at(u64 route, struct tb_switch sw)
	255	{
	256	u8 port;
	257
	258	port = route >> (sw->config.depth * 8);
	259	if (WARN_ON(port > sw->config.max_port_number))
	260	return NULL;
	261	return &sw->ports[port];
	262	}
	263
a25c8b2f AN	264	static inline int tb_sw_read(struct tb_switch sw, void buffer,
	265	enum tb_cfg_space space, u32 offset, u32 length)
	266	{
	267	return tb_cfg_read(sw->tb->ctl,
	268	buffer,
	269	tb_route(sw),
	270	0,
	271	space,
	272	offset,
	273	length);
	274	}
	275
	276	static inline int tb_sw_write(struct tb_switch sw, void buffer,
	277	enum tb_cfg_space space, u32 offset, u32 length)
	278	{
	279	return tb_cfg_write(sw->tb->ctl,
	280	buffer,
	281	tb_route(sw),
	282	0,
	283	space,
	284	offset,
	285	length);
	286	}
	287
	288	static inline int tb_port_read(struct tb_port port, void buffer,
	289	enum tb_cfg_space space, u32 offset, u32 length)
	290	{
	291	return tb_cfg_read(port->sw->tb->ctl,
	292	buffer,
	293	tb_route(port->sw),
	294	port->port,
	295	space,
	296	offset,
	297	length);
	298	}
	299
16a1258a	300	static inline int tb_port_write(struct tb_port port, const void buffer,
a25c8b2f AN	301	enum tb_cfg_space space, u32 offset, u32 length)
	302	{
	303	return tb_cfg_write(port->sw->tb->ctl,
	304	buffer,
	305	tb_route(port->sw),
	306	port->port,
	307	space,
	308	offset,
	309	length);
	310	}
	311
	312	#define tb_err(tb, fmt, arg...) dev_err(&(tb)->nhi->pdev->dev, fmt, ## arg)
	313	#define tb_WARN(tb, fmt, arg...) dev_WARN(&(tb)->nhi->pdev->dev, fmt, ## arg)
	314	#define tb_warn(tb, fmt, arg...) dev_warn(&(tb)->nhi->pdev->dev, fmt, ## arg)
	315	#define tb_info(tb, fmt, arg...) dev_info(&(tb)->nhi->pdev->dev, fmt, ## arg)
	316
	317
	318	#define __TB_SW_PRINT(level, sw, fmt, arg...) \
	319	do { \
	320	struct tb_switch *__sw = (sw); \
	321	level(__sw->tb, "%llx: " fmt, \
	322	tb_route(__sw), ## arg); \
	323	} while (0)
	324	#define tb_sw_WARN(sw, fmt, arg...) __TB_SW_PRINT(tb_WARN, sw, fmt, ##arg)
	325	#define tb_sw_warn(sw, fmt, arg...) __TB_SW_PRINT(tb_warn, sw, fmt, ##arg)
	326	#define tb_sw_info(sw, fmt, arg...) __TB_SW_PRINT(tb_info, sw, fmt, ##arg)
	327
	328
	329	#define __TB_PORT_PRINT(level, _port, fmt, arg...) \
	330	do { \
	331	struct tb_port *__port = (_port); \
	332	level(__port->sw->tb, "%llx:%x: " fmt, \
	333	tb_route(__port->sw), __port->port, ## arg); \
	334	} while (0)
	335	#define tb_port_WARN(port, fmt, arg...) \
	336	__TB_PORT_PRINT(tb_WARN, port, fmt, ##arg)
	337	#define tb_port_warn(port, fmt, arg...) \
	338	__TB_PORT_PRINT(tb_warn, port, fmt, ##arg)
	339	#define tb_port_info(port, fmt, arg...) \
	340	__TB_PORT_PRINT(tb_info, port, fmt, ##arg)
	341
f67cf491	342	struct tb icm_probe(struct tb_nhi nhi);
9d3cce0b MW	343	struct tb tb_probe(struct tb_nhi nhi);
9d3cce0b MW	344
9d3cce0b	345	extern struct device_type tb_domain_type;
bfe778ac	346	extern struct device_type tb_switch_type;
9d3cce0b MW	347
	348	int tb_domain_init(void);
	349	void tb_domain_exit(void);
e6b245cc	350	void tb_switch_exit(void);
d1ff7024 MW	351	int tb_xdomain_init(void);
d1ff7024 MW	352	void tb_xdomain_exit(void);
a25c8b2f	353
9d3cce0b MW	354	struct tb tb_domain_alloc(struct tb_nhi nhi, size_t privsize);
	355	int tb_domain_add(struct tb *tb);
	356	void tb_domain_remove(struct tb *tb);
	357	int tb_domain_suspend_noirq(struct tb *tb);
	358	int tb_domain_resume_noirq(struct tb *tb);
f67cf491 MW	359	int tb_domain_suspend(struct tb *tb);
	360	void tb_domain_complete(struct tb *tb);
	361	int tb_domain_approve_switch(struct tb tb, struct tb_switch sw);
	362	int tb_domain_approve_switch_key(struct tb tb, struct tb_switch sw);
	363	int tb_domain_challenge_switch_key(struct tb tb, struct tb_switch sw);
e6b245cc	364	int tb_domain_disconnect_pcie_paths(struct tb *tb);
d1ff7024 MW	365	int tb_domain_approve_xdomain_paths(struct tb tb, struct tb_xdomain xd);
	366	int tb_domain_disconnect_xdomain_paths(struct tb tb, struct tb_xdomain xd);
	367	int tb_domain_disconnect_all_paths(struct tb *tb);
9d3cce0b MW	368
	369	static inline void tb_domain_put(struct tb *tb)
	370	{
	371	put_device(&tb->dev);
	372	}
d6cc51cd	373
bfe778ac MW	374	struct tb_switch tb_switch_alloc(struct tb tb, struct device *parent,
bfe778ac MW	375	u64 route);
e6b245cc MW	376	struct tb_switch tb_switch_alloc_safe_mode(struct tb tb,
e6b245cc MW	377	struct device *parent, u64 route);
bfe778ac MW	378	int tb_switch_configure(struct tb_switch *sw);
	379	int tb_switch_add(struct tb_switch *sw);
	380	void tb_switch_remove(struct tb_switch *sw);
23dd5bb4 AN	381	void tb_switch_suspend(struct tb_switch *sw);
	382	int tb_switch_resume(struct tb_switch *sw);
	383	int tb_switch_reset(struct tb *tb, u64 route);
aae20bb6	384	void tb_sw_set_unplugged(struct tb_switch *sw);
053596d9	385	struct tb_switch get_switch_at_route(struct tb_switch sw, u64 route);
f67cf491 MW	386	struct tb_switch tb_switch_find_by_link_depth(struct tb tb, u8 link,
f67cf491 MW	387	u8 depth);
7c39ffe7	388	struct tb_switch tb_switch_find_by_uuid(struct tb tb, const uuid_t *uuid);
f67cf491	389
bfe778ac MW	390	static inline void tb_switch_put(struct tb_switch *sw)
	391	{
	392	put_device(&sw->dev);
	393	}
	394
	395	static inline bool tb_is_switch(const struct device *dev)
	396	{
	397	return dev->type == &tb_switch_type;
	398	}
	399
	400	static inline struct tb_switch tb_to_switch(struct device dev)
	401	{
	402	if (tb_is_switch(dev))
	403	return container_of(dev, struct tb_switch, dev);
	404	return NULL;
	405	}
	406
9da672a4	407	int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
520b6702 AN	408	int tb_port_add_nfc_credits(struct tb_port *port, int credits);
520b6702 AN	409	int tb_port_clear_counter(struct tb_port *port, int counter);
9da672a4	410
da2da04b MW	411	int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
da2da04b MW	412	int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);
e2b8785e	413
520b6702 AN	414	struct tb_path tb_path_alloc(struct tb tb, int num_hops);
	415	void tb_path_free(struct tb_path *path);
	416	int tb_path_activate(struct tb_path *path);
	417	void tb_path_deactivate(struct tb_path *path);
	418	bool tb_path_is_invalid(struct tb_path *path);
	419
cd22e73b AN	420	int tb_drom_read(struct tb_switch *sw);
cd22e73b AN	421	int tb_drom_read_uid_only(struct tb_switch sw, u64 uid);
c90553b3	422
a25c8b2f AN	423
	424	static inline int tb_route_length(u64 route)
	425	{
	426	return (fls64(route) + TB_ROUTE_SHIFT - 1) / TB_ROUTE_SHIFT;
	427	}
	428
	429	static inline bool tb_is_upstream_port(struct tb_port *port)
	430	{
	431	return port == tb_upstream_port(port->sw);
	432	}
	433
9da672a4 AN	434	/**
	435	* tb_downstream_route() - get route to downstream switch
	436	*
	437	* Port must not be the upstream port (otherwise a loop is created).
	438	*
	439	* Return: Returns a route to the switch behind @port.
	440	*/
	441	static inline u64 tb_downstream_route(struct tb_port *port)
	442	{
	443	return tb_route(port->sw)
	444	\| ((u64) port->port << (port->sw->config.depth * 8));
	445	}
	446
d1ff7024 MW	447	bool tb_xdomain_handle_request(struct tb *tb, enum tb_cfg_pkg_type type,
	448	const void *buf, size_t size);
	449	struct tb_xdomain tb_xdomain_alloc(struct tb tb, struct device *parent,
	450	u64 route, const uuid_t *local_uuid,
	451	const uuid_t *remote_uuid);
	452	void tb_xdomain_add(struct tb_xdomain *xd);
	453	void tb_xdomain_remove(struct tb_xdomain *xd);
	454	struct tb_xdomain tb_xdomain_find_by_link_depth(struct tb tb, u8 link,
	455	u8 depth);
	456
d6cc51cd	457	#endif