2014-06-03 14:04:00 -06:00
|
|
|
/*
|
|
|
|
* Thunderbolt Cactus Ridge driver - bus logic (NHI independent)
|
|
|
|
*
|
|
|
|
* Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef TB_H_
|
|
|
|
#define TB_H_
|
|
|
|
|
2014-06-03 14:04:02 -06:00
|
|
|
#include <linux/pci.h>
|
|
|
|
|
|
|
|
#include "tb_regs.h"
|
2014-06-03 14:04:00 -06:00
|
|
|
#include "ctl.h"
|
|
|
|
|
2014-06-03 14:04:02 -06:00
|
|
|
/**
|
|
|
|
* struct tb_switch - a thunderbolt switch
|
|
|
|
*/
|
|
|
|
struct tb_switch {
|
|
|
|
struct tb_regs_switch_header config;
|
|
|
|
struct tb_port *ports;
|
|
|
|
struct tb *tb;
|
2014-06-03 14:04:04 -06:00
|
|
|
int cap_plug_events; /* offset, zero if not found */
|
2014-06-03 14:04:06 -06:00
|
|
|
bool is_unplugged; /* unplugged, will go away */
|
2014-06-03 14:04:02 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
|
|
* struct tb_port - a thunderbolt port, part of a tb_switch
|
|
|
|
*/
|
|
|
|
struct tb_port {
|
|
|
|
struct tb_regs_port_header config;
|
|
|
|
struct tb_switch *sw;
|
|
|
|
struct tb_port *remote; /* remote port, NULL if not connected */
|
2014-06-03 14:04:05 -06:00
|
|
|
int cap_phy; /* offset, zero if not found */
|
2014-06-03 14:04:02 -06:00
|
|
|
u8 port; /* port number on switch */
|
|
|
|
};
|
|
|
|
|
2014-06-03 14:04:00 -06:00
|
|
|
/**
|
|
|
|
* struct tb - main thunderbolt bus structure
|
|
|
|
*/
|
|
|
|
struct tb {
|
|
|
|
struct mutex lock; /*
|
|
|
|
* Big lock. Must be held when accessing cfg or
|
|
|
|
* any struct tb_switch / struct tb_port.
|
|
|
|
*/
|
|
|
|
struct tb_nhi *nhi;
|
|
|
|
struct tb_ctl *ctl;
|
|
|
|
struct workqueue_struct *wq; /* ordered workqueue for plug events */
|
2014-06-03 14:04:02 -06:00
|
|
|
struct tb_switch *root_switch;
|
2014-06-03 14:04:00 -06:00
|
|
|
bool hotplug_active; /*
|
|
|
|
* tb_handle_hotplug will stop progressing plug
|
|
|
|
* events and exit if this is not set (it needs to
|
|
|
|
* acquire the lock one more time). Used to drain
|
|
|
|
* wq after cfg has been paused.
|
|
|
|
*/
|
|
|
|
|
|
|
|
};
|
|
|
|
|
2014-06-03 14:04:02 -06:00
|
|
|
/* 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 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, 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)
|
|
|
|
|
|
|
|
|
2014-06-03 14:04:00 -06:00
|
|
|
struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi);
|
|
|
|
void thunderbolt_shutdown_and_free(struct tb *tb);
|
|
|
|
|
2014-06-03 14:04:02 -06:00
|
|
|
struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route);
|
|
|
|
void tb_switch_free(struct tb_switch *sw);
|
2014-06-03 14:04:06 -06:00
|
|
|
void tb_sw_set_unpplugged(struct tb_switch *sw);
|
|
|
|
struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route);
|
2014-06-03 14:04:02 -06:00
|
|
|
|
2014-06-03 14:04:05 -06:00
|
|
|
int tb_wait_for_port(struct tb_port *port, bool wait_if_unplugged);
|
|
|
|
|
2014-06-03 14:04:03 -06:00
|
|
|
int tb_find_cap(struct tb_port *port, enum tb_cfg_space space, u32 value);
|
|
|
|
|
2014-06-03 14:04:02 -06:00
|
|
|
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
|
2014-06-03 14:04:05 -06:00
|
|
|
/**
|
|
|
|
* 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));
|
|
|
|
}
|
|
|
|
|
2014-06-03 14:04:00 -06:00
|
|
|
#endif
|