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 #include "tb_msgs.h" 12 13 /* control channel */ 14 struct tb_ctl; 15 16 typedef void (*hotplug_cb)(void *data, u64 route, u8 port, bool unplug); 17 18 struct tb_ctl *tb_ctl_alloc(struct tb_nhi *nhi, hotplug_cb cb, void *cb_data); 19 void tb_ctl_start(struct tb_ctl *ctl); 20 void tb_ctl_stop(struct tb_ctl *ctl); 21 void tb_ctl_free(struct tb_ctl *ctl); 22 23 /* configuration commands */ 24 25 #define TB_CFG_DEFAULT_TIMEOUT 5000 /* msec */ 26 27 struct tb_cfg_result { 28 u64 response_route; 29 u32 response_port; /* 30 * If err = 1 then this is the port that send the 31 * error. 32 * If err = 0 and if this was a cfg_read/write then 33 * this is the the upstream port of the responding 34 * switch. 35 * Otherwise the field is set to zero. 36 */ 37 int err; /* negative errors, 0 for success, 1 for tb errors */ 38 enum tb_cfg_error tb_error; /* valid if err == 1 */ 39 }; 40 41 static inline u64 tb_cfg_get_route(const struct tb_cfg_header *header) 42 { 43 return (u64) header->route_hi << 32 | header->route_lo; 44 } 45 46 static inline struct tb_cfg_header tb_cfg_make_header(u64 route) 47 { 48 struct tb_cfg_header header = { 49 .route_hi = route >> 32, 50 .route_lo = route, 51 }; 52 /* check for overflow, route_hi is not 32 bits! */ 53 WARN_ON(tb_cfg_get_route(&header) != route); 54 return header; 55 } 56 57 int tb_cfg_error(struct tb_ctl *ctl, u64 route, u32 port, 58 enum tb_cfg_error error); 59 struct tb_cfg_result tb_cfg_reset(struct tb_ctl *ctl, u64 route, 60 int timeout_msec); 61 struct tb_cfg_result tb_cfg_read_raw(struct tb_ctl *ctl, void *buffer, 62 u64 route, u32 port, 63 enum tb_cfg_space space, u32 offset, 64 u32 length, int timeout_msec); 65 struct tb_cfg_result tb_cfg_write_raw(struct tb_ctl *ctl, const void *buffer, 66 u64 route, u32 port, 67 enum tb_cfg_space space, u32 offset, 68 u32 length, int timeout_msec); 69 int tb_cfg_read(struct tb_ctl *ctl, void *buffer, u64 route, u32 port, 70 enum tb_cfg_space space, u32 offset, u32 length); 71 int tb_cfg_write(struct tb_ctl *ctl, const void *buffer, u64 route, u32 port, 72 enum tb_cfg_space space, u32 offset, u32 length); 73 int tb_cfg_get_upstream_port(struct tb_ctl *ctl, u64 route); 74 75 76 #endif 77