You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
4.6 KiB
143 lines
4.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* 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 <linux/kref.h>
|
|
|
|
#include "nhi.h"
|
|
#include "tb_msgs.h"
|
|
|
|
/* control channel */
|
|
struct tb_ctl;
|
|
|
|
typedef void (*event_cb)(void *data, enum tb_cfg_pkg_type type,
|
|
const void *buf, size_t size);
|
|
|
|
struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, event_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 */
|
|
|
|
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 */
|
|
};
|
|
|
|
struct ctl_pkg {
|
|
struct tb_ctl *ctl;
|
|
void *buffer;
|
|
struct ring_frame frame;
|
|
};
|
|
|
|
/**
|
|
* struct tb_cfg_request - Control channel request
|
|
* @kref: Reference count
|
|
* @ctl: Pointer to the control channel structure. Only set when the
|
|
* request is queued.
|
|
* @request_size: Size of the request packet (in bytes)
|
|
* @request_type: Type of the request packet
|
|
* @response: Response is stored here
|
|
* @response_size: Maximum size of one response packet
|
|
* @response_type: Expected type of the response packet
|
|
* @npackets: Number of packets expected to be returned with this request
|
|
* @match: Function used to match the incoming packet
|
|
* @copy: Function used to copy the incoming packet to @response
|
|
* @callback: Callback called when the request is finished successfully
|
|
* @callback_data: Data to be passed to @callback
|
|
* @flags: Flags for the request
|
|
* @work: Work item used to complete the request
|
|
* @result: Result after the request has been completed
|
|
* @list: Requests are queued using this field
|
|
*
|
|
* An arbitrary request over Thunderbolt control channel. For standard
|
|
* control channel message, one should use tb_cfg_read/write() and
|
|
* friends if possible.
|
|
*/
|
|
struct tb_cfg_request {
|
|
struct kref kref;
|
|
struct tb_ctl *ctl;
|
|
const void *request;
|
|
size_t request_size;
|
|
enum tb_cfg_pkg_type request_type;
|
|
void *response;
|
|
size_t response_size;
|
|
enum tb_cfg_pkg_type response_type;
|
|
size_t npackets;
|
|
bool (*match)(const struct tb_cfg_request *req,
|
|
const struct ctl_pkg *pkg);
|
|
bool (*copy)(struct tb_cfg_request *req, const struct ctl_pkg *pkg);
|
|
void (*callback)(void *callback_data);
|
|
void *callback_data;
|
|
unsigned long flags;
|
|
struct work_struct work;
|
|
struct tb_cfg_result result;
|
|
struct list_head list;
|
|
};
|
|
|
|
#define TB_CFG_REQUEST_ACTIVE 0
|
|
#define TB_CFG_REQUEST_CANCELED 1
|
|
|
|
struct tb_cfg_request *tb_cfg_request_alloc(void);
|
|
void tb_cfg_request_get(struct tb_cfg_request *req);
|
|
void tb_cfg_request_put(struct tb_cfg_request *req);
|
|
int tb_cfg_request(struct tb_ctl *ctl, struct tb_cfg_request *req,
|
|
void (*callback)(void *), void *callback_data);
|
|
void tb_cfg_request_cancel(struct tb_cfg_request *req, int err);
|
|
struct tb_cfg_result tb_cfg_request_sync(struct tb_ctl *ctl,
|
|
struct tb_cfg_request *req, int timeout_msec);
|
|
|
|
static inline u64 tb_cfg_get_route(const struct tb_cfg_header *header)
|
|
{
|
|
return (u64) header->route_hi << 32 | header->route_lo;
|
|
}
|
|
|
|
static inline struct tb_cfg_header tb_cfg_make_header(u64 route)
|
|
{
|
|
struct tb_cfg_header header = {
|
|
.route_hi = route >> 32,
|
|
.route_lo = route,
|
|
};
|
|
/* check for overflow, route_hi is not 32 bits! */
|
|
WARN_ON(tb_cfg_get_route(&header) != route);
|
|
return header;
|
|
}
|
|
|
|
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, const 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, const 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
|
|
|