LXR linux/drivers/thunderbolt/ctl.h

   1/*
   2 * Thunderbolt Cactus Ridge driver - control channel and configuration commands
   3 *
   4 * Copyright (c) 2014 Andreas Noever <andreas.noever@gmail.com>
   5 */
   6
   7#ifndef _TB_CFG
   8#define _TB_CFG
   9
  10#include "nhi.h"
  11
  12/* control channel */
  13struct tb_ctl;
  14
  15typedef void (*hotplug_cb)(void *data, u64 route, u8 port, bool unplug);
  16
  17struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb cb, void *cb_data);
  18void tb_ctl_start(struct tb_ctl *ctl);
  19void tb_ctl_stop(struct tb_ctl *ctl);
  20void tb_ctl_free(struct tb_ctl *ctl);
  21
  22/* configuration commands */
  23
  24#define TB_CFG_DEFAULT_TIMEOUT 5000 /* msec */
  25
  26enum tb_cfg_space {
  27        TB_CFG_HOPS = 0,
  28        TB_CFG_PORT = 1,
  29        TB_CFG_SWITCH = 2,
  30        TB_CFG_COUNTERS = 3,
  31};
  32
  33enum tb_cfg_error {
  34        TB_CFG_ERROR_PORT_NOT_CONNECTED = 0,
  35        TB_CFG_ERROR_INVALID_CONFIG_SPACE = 2,
  36        TB_CFG_ERROR_NO_SUCH_PORT = 4,
  37        TB_CFG_ERROR_ACK_PLUG_EVENT = 7, /* send as reply to TB_CFG_PKG_EVENT */
  38        TB_CFG_ERROR_LOOP = 8,
  39};
  40
  41struct tb_cfg_result {
  42        u64 response_route;
  43        u32 response_port; /*
  44                            * If err = 1 then this is the port that send the
  45                            * error.
  46                            * If err = 0 and if this was a cfg_read/write then
  47                            * this is the the upstream port of the responding
  48                            * switch.
  49                            * Otherwise the field is set to zero.
  50                            */
  51        int err; /* negative errors, 0 for success, 1 for tb errors */
  52        enum tb_cfg_error tb_error; /* valid if err == 1 */
  53};
  54
  55
  56int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port,
  57                 enum tb_cfg_error error);
  58struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route,
  59                                  int timeout_msec);
  60struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer,
  61                                     u64 route, u32 port,
  62                                     enum tb_cfg_space space, u32 offset,
  63                                     u32 length, int timeout_msec);
  64struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, void *buffer,
  65                                      u64 route, u32 port,
  66                                      enum tb_cfg_space space, u32 offset,
  67                                      u32 length, int timeout_msec);
  68int tb_cfg_read(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
  69                enum tb_cfg_space space, u32 offset, u32 length);
  70int tb_cfg_write(struct tb_ctl *ctl, void *buffer, u64 route, u32 port,
  71                 enum tb_cfg_space space, u32 offset, u32 length);
  72int tb_cfg_get_upstream_port(struct tb_ctl *ctl, u64 route);
  73
  74
  75#endif
  76