tb_pci_port_enable(9)

💅 tb_pci_port_enable — like, the port-wrangler of Thunderbolt

Okay bestie, first things first: we're in the Kernel API Manual today, and this little function is tb_pci_port_enable — section (9), obviously, because it's kernel-internal and only the coolest subsystems get to live there. ✨

This is the function that flips the switch on a PCIe adapter port. That's it. That's the whole job. But she does it flawlessly. 🎀

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🌸 NAME

tb_pci_port_enable — enable the PCIe adapter port, no cap 💖

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✨ SYNOPSIS

int tb_pci_port_enable (struct tb_port *port , bool enable );

Yes the spacing is exactly like that, don't @ me, that's the generated manpage vibe and we respect it. 🫶

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🦋 ARGUMENTS

• port — the PCIe port you wanna enable. This is your main character. Give her a struct tb_port * and let her cook. 👑
• enable — a bool that says "on" or "off". Like the world's tiniest light switch: enable/disable the PCIe adapter. One boolean, so much power. 💅

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💜 RETURN

• 0 on success (slay 💯)
• negative errno otherwise (it's giving "something went wrong, check the errno, bestie" 😭)

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🌈 SEE ALSO

Right, buckle up buttercup, because this cross-reference list is long and we're not skipping a single one. All of these live in the kernel file ./drivers/thunderbolt/switch.c — that's the source of truth, iykyk. 🔥

🧚 The port girlies (general + hopid department)

• tb_switch_nvm_read(9)
• tb_port_state(9)
• tb_wait_for_port(9)
• tb_port_add_nfc_credits(9)
• tb_port_clear_counter(9)
• tb_port_unlock(9)
• tb_port_enable(9)
• tb_port_disable(9)
• tb_port_reset(9)
• tb_port_alloc_in_hopid(9)
• tb_port_alloc_out_hopid(9)
• tb_port_release_in_hopid(9)
• tb_port_release_out_hopid(9)
• tb_next_port_on_path(9)

🦋 Link speed / width / lane-bonding besties

• tb_port_get_link_speed(9)
• tb_port_get_link_generation(9)
• tb_port_get_link_width(9)
• tb_port_width_supported(9)
• tb_port_set_link_width(9)
• tb_port_set_lane_bonding(9)
• tb_port_lane_bonding_enable(9)
• tb_port_lane_bonding_disable(9)
• tb_port_wait_for_link_width(9)
• tb_port_update_credits(9)

👀 "Is it even on tho" squad

• tb_port_is_enabled(9)
• tb_usb3_port_is_enabled(9)
• tb_usb3_port_enable(9)
• tb_pci_port_is_enabled(9)

🍓 DisplayPort crew (dp, the glamorous ones)

• tb_dp_port_hpd_is_active(9)
• tb_dp_port_hpd_clear(9)
• tb_dp_port_set_hops(9)
• tb_dp_port_is_enabled(9)
• tb_dp_port_enable(9)

⭐ The whole switch extended universe

• tb_switch_reset(9)
• tb_switch_wait_for_bit(9)
• tb_switch_alloc(9)
• tb_switch_alloc_safe_mode(9)
• tb_switch_configure(9)
• tb_switch_configuration_valid(9)
• tb_switch_lane_bonding_enable(9)
• tb_switch_lane_bonding_disable(9)
• tb_switch_set_link_width(9)
• tb_switch_configure_link(9)
• tb_switch_unconfigure_link(9)
• tb_switch_add(9)
• tb_switch_remove(9)
• tb_sw_set_unplugged(9)
• tb_switch_resume(9)
• tb_switch_suspend(9)
• tb_switch_query_dp_resource(9)
• tb_switch_alloc_dp_resource(9)
• tb_switch_dealloc_dp_resource(9)
• tb_switch_find_by_link_depth(9)
• tb_switch_find_by_uuid(9)
• tb_switch_find_by_route(9)
• tb_switch_find_port(9)
• tb_switch_pcie_l1_enable(9)
• tb_switch_xhci_connect(9)
• tb_switch_xhci_disconnect(9)

Fr fr, that's every single one. Nothing dropped, nothing merged, nothing invented. Screenshot it, bookmark it, tattoo it on your forearm, whatever works. 📸

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🎀 the sign-off

Bye bestie! 💖 This iconic little page ships out of ./drivers/thunderbolt and is dated October 2026 — yes, the future, because Thunderbolt stays ahead. Go enable a port, treat yourself. 👑✨💅