tb_is_upstream_port(9)

🌈 tb_is_upstream_port(9) 🌈

okay so bestie, welcome to the Kernel API Manual entry for tb_is_upstream_port(9) — yes, the whole vibe is “is this port upstream facing?” and we’re gonna find out together 💅✨

🎀 NAME 🎀

tb_is_upstream_port — Is the port upstream facing

✨ SYNOPSIS ✨

bool tb_is_upstream_port (const struct tb_port *port );

💖 ARGUMENTS 💖

• port — Port to check. that’s the one, the port in question 👀

🦋 RETURN 🦋

true if port is an upstream facing port. and in case of dual link ports, both return true — both of them, no cap 💯

🌸 SEE ALSO 🌸

Kernel file ./drivers/thunderbolt/tb.h plus this whole friend group:

• struct tb_nvm(9)
• enum tb_switch_tmu_mode(9)
• struct tb_switch_tmu(9)
• struct tb_switch(9)
• struct tb_bandwidth_group(9)
• struct tb_port(9)
• struct usb4_port(9)
• struct tb_retimer(9)
• struct tb_path_hop(9)
• enum tb_path_port(9)
• struct tb_path(9)
• struct tb_cm_ops(9)
• tb_upstream_port(9)
• tb_port_has_remote(9)
• tb_domain_event(9)
• tb_switch_for_each_port(9)
• tb_switch_downstream_port(9)
• tb_switch_depth(9)
• tb_switch_is_icm(9)
• tb_switch_tmu_is_configured(9)
• tb_switch_tmu_is_enabled(9)
• tb_switch_clx_is_enabled(9)
• tb_port_path_direction_downstream(9)
• tb_for_each_port_on_path(9)
• tb_for_each_upstream_port_on_path(9)
• tb_path_for_each_hop(9)
• tb_downstream_route(9)
• tb_xdomain_downstream_port(9)
• usb4_switch_version(9)
• tb_switch_is_usb4(9)
• enum usb4_sb_target(9)
• enum usb4_margin_sw_error_counter(9)
• struct usb4_port_margining_params(9)

mwah 💋 — source: ./drivers/thunderbolt, date: October 2026, page title: tb_is_upstream_port(9). byeee, go check those ports 🫶✨