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author | Andreas Noever <andreas.noever@gmail.com> | 2014-06-03 22:04:02 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-19 14:07:08 -0700 |
commit | a25c8b2fc9636aaf29d9d9d89f92cdfd27a2a23d (patch) | |
tree | db952ae5e1d2897f54751e9d2d4c258dce853a00 /drivers/thunderbolt/tb.h | |
parent | 7adf60972c692b0b3d0958cd7322e22a67187111 (diff) | |
download | linux-stable-a25c8b2fc9636aaf29d9d9d89f92cdfd27a2a23d.tar.gz linux-stable-a25c8b2fc9636aaf29d9d9d89f92cdfd27a2a23d.tar.bz2 linux-stable-a25c8b2fc9636aaf29d9d9d89f92cdfd27a2a23d.zip |
thunderbolt: Initialize root switch and ports
This patch adds the structures tb_switch and tb_port as well as code to
initialize the root switch.
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/thunderbolt/tb.h')
-rw-r--r-- | drivers/thunderbolt/tb.h | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index 6055dfd713fc..389dbb405c5f 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -7,9 +7,31 @@ #ifndef TB_H_ #define TB_H_ +#include <linux/pci.h> + +#include "tb_regs.h" #include "ctl.h" /** + * struct tb_switch - a thunderbolt switch + */ +struct tb_switch { + struct tb_regs_switch_header config; + struct tb_port *ports; + struct tb *tb; +}; + +/** + * 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 */ + u8 port; /* port number on switch */ +}; + +/** * struct tb - main thunderbolt bus structure */ struct tb { @@ -20,6 +42,7 @@ struct tb { struct tb_nhi *nhi; struct tb_ctl *ctl; struct workqueue_struct *wq; /* ordered workqueue for plug events */ + struct tb_switch *root_switch; bool hotplug_active; /* * tb_handle_hotplug will stop progressing plug * events and exit if this is not set (it needs to @@ -29,7 +52,122 @@ struct tb { }; +/* 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) + + struct tb *thunderbolt_alloc_and_start(struct tb_nhi *nhi); void thunderbolt_shutdown_and_free(struct tb *tb); +struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route); +void tb_switch_free(struct tb_switch *sw); + + +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); +} + #endif |