diff options
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 33 | ||||
| -rw-r--r-- | drivers/thunderbolt/tb.h | 1 |
2 files changed, 34 insertions, 0 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 2a0bded44922..4e2b2097bbfc 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -1479,6 +1479,7 @@ struct tb_sw_lookup { u8 link; u8 depth; const uuid_t *uuid; + u64 route; }; static int tb_switch_match(struct device *dev, void *data) @@ -1494,6 +1495,11 @@ static int tb_switch_match(struct device *dev, void *data) if (lookup->uuid) return !memcmp(sw->uuid, lookup->uuid, sizeof(*lookup->uuid)); + if (lookup->route) { + return sw->config.route_lo == lower_32_bits(lookup->route) && + sw->config.route_hi == upper_32_bits(lookup->route); + } + /* Root switch is matched only by depth */ if (!lookup->depth) return !sw->depth; @@ -1551,6 +1557,33 @@ struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid) return NULL; } +/** + * tb_switch_find_by_route() - Find switch by route string + * @tb: Domain the switch belongs + * @route: Route string to look for + * + * Returned switch has reference count increased so the caller needs to + * call tb_switch_put() when done with the switch. + */ +struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route) +{ + struct tb_sw_lookup lookup; + struct device *dev; + + if (!route) + return tb_switch_get(tb->root_switch); + + memset(&lookup, 0, sizeof(lookup)); + lookup.tb = tb; + lookup.route = route; + + dev = bus_find_device(&tb_bus_type, NULL, &lookup, tb_switch_match); + if (dev) + return tb_to_switch(dev); + + return NULL; +} + void tb_switch_exit(void) { ida_destroy(&nvm_ida); diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h index c7bd77e9c2c3..2cd6085a6e10 100644 --- a/drivers/thunderbolt/tb.h +++ b/drivers/thunderbolt/tb.h @@ -386,6 +386,7 @@ struct tb_switch *get_switch_at_route(struct tb_switch *sw, u64 route); struct tb_switch *tb_switch_find_by_link_depth(struct tb *tb, u8 link, u8 depth); struct tb_switch *tb_switch_find_by_uuid(struct tb *tb, const uuid_t *uuid); +struct tb_switch *tb_switch_find_by_route(struct tb *tb, u64 route); static inline struct tb_switch *tb_switch_get(struct tb_switch *sw) { |