tb_port_get_link_generation(9)

💅 tb_port_get_link_generation — the manual page, but make it make sense

okay so bestie, welcome to the tb_port_get_link_generation(9) page from the Kernel API Manual ✨ this is your girl's guide to the Thunderbolt link-generation getter, and yes we are gonna read the whole thing together, no skipping 🫶

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🌸 NAME 🌸

tb_port_get_link_generation — literally just returns the link generation, that's the whole vibe 💫

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✨ SYNOPSIS ✨

int tb_port_get_link_generation (struct tb_port *port );

that's it, that's the signature, copy it exactly, do not freestyle it 🙈

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🎀 ARGUMENTS 🎀

• port — a lane adapter, bestie. that's the whole argument. one (1) lane adapter. slay 💅

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⭐ RETURN ⭐

it gives you back the link generation as a number 🔥 — or a negative errno if something goes wrong 😭 (yes, negative errno is the failure signal, keep that in mind, iykyk).

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🦋 DESCRIPTION 🦋

so here's the tea ☕ this function does not distinguish between Thunderbolt 1 and Thunderbolt 2 links — not even a little bit, not even trying. so for those two, it always returns 2. always. no cap. periodt 💀

fr fr if you were hoping for a Thunderbolt 1 vs 2 glow-up difference, there isn't one. it's 2 for both. that's the whole deal 🎀

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/thunderbolt/switch.c — go say hi to it 👋

and now the extended friend group, in the exact order they were introduced (do not reorder, it's giving clique hierarchy) 💜

• 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), tb_port_get_link_speed(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), tb_port_is_enabled(9)
• tb_usb3_port_is_enabled(9), tb_usb3_port_enable(9), tb_pci_port_is_enabled(9), tb_pci_port_enable(9), 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)
• 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)

like, that's a whole friend group, and every single one of them made the list 💖

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and that's the page!! 🧚 sourced from ./drivers/thunderbolt, dated October 2026, and it's tb_port_get_link_generation(9) on the way out — mwah, love u, go read your kernel docs bestie 💜✨🍓