Release 4.7 drivers/thunderbolt/ctl.h

/*
 * Thunderbolt Cactus Ridge driver - control channel and configuration commands
 *
 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
 */

#ifndef _TB_CFG

#define _TB_CFG

#include "nhi.h"

/* control channel */
struct tb_ctl;


typedef void (*hotplug_cb)(void *data, u64 route, u8 port, bool unplug);

struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb cb, void *cb_data);
void tb_ctl_start(struct tb_ctl *ctl);
void tb_ctl_stop(struct tb_ctl *ctl);
void tb_ctl_free(struct tb_ctl *ctl);

/* configuration commands */


#define TB_CFG_DEFAULT_TIMEOUT 5000 
/* msec */


enum tb_cfg_space {
	
TB_CFG_HOPS = 0,
	
TB_CFG_PORT = 1,
	
TB_CFG_SWITCH = 2,
	
TB_CFG_COUNTERS = 3,
};


enum tb_cfg_error {
	
TB_CFG_ERROR_PORT_NOT_CONNECTED = 0,
	
TB_CFG_ERROR_INVALID_CONFIG_SPACE = 2,
	
TB_CFG_ERROR_NO_SUCH_PORT = 4,
	
TB_CFG_ERROR_ACK_PLUG_EVENT = 7, /* send as reply to TB_CFG_PKG_EVENT */
	
TB_CFG_ERROR_LOOP = 8,
};


struct tb_cfg_result {
	
u64 response_route;
	
u32 response_port; /*
                            * If err = 1 then this is the port that send the
                            * error.
                            * If err = 0 and if this was a cfg_read/write then
                            * this is the the upstream port of the responding
                            * switch.
                            * Otherwise the field is set to zero.
                            */
	
int err; /* negative errors, 0 for success, 1 for tb errors */
	
enum tb_cfg_error tb_error; /* valid if err == 1 */
};


int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port,
		 enum tb_cfg_error error);
struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route,
				  int timeout_msec);
struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer,
				     u64 route, u32 port,
				     enum tb_cfg_space space, u32 offset,
				     u32 length, int timeout_msec);
struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, void *buffer,
				      u64 route, u32 port,
				      enum tb_cfg_space space, u32 offset,
				      u32 length, int timeout_msec);
int tb_cfg_read(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
		enum tb_cfg_space space, u32 offset, u32 length);
int tb_cfg_write(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
		 enum tb_cfg_space space, u32 offset, u32 length);
int tb_cfg_get_upstream_port(struct tb_ctl *ctl, u64 route);


#endif
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Directory: drivers/thunderbolt

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