usb4_switch_nvm_set_offset(9)

💅 usb4_switch_nvm_set_offset — a Kernel API Manual moment (section 9, bestie)

okay so this is usb4_switch_nvm_set_offset(9) and honestly? it's giving "small function, big job" energy. it lives in the Kernel API Manual, and we're gonna get into it ✨

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🎀 NAME 🎀

usb4_switch_nvm_set_offset — Set NVM write offset. that's it, that's the whole vibe. it sets the offset. for NVM. for writing. slay 💅

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🌸 SYNOPSIS 🌸

int usb4_switch_nvm_set_offset (struct tb_switch *sw , unsigned int
address );

like, literally just hand it a router and an address and it does its little thing 🫶

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🦋 ARGUMENTS 🦋

• sw — the USB4 router. your main character. the device we're doing all this for 👑
• address — the start offset. where in the NVM we're starting from, bestie 📍

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✨ DESCRIPTION ✨

so basically this function explicitly sets the NVM write offset. and the way that normally, when you're writing to NVM, that offset gets set automatically by usb4_switch_nvm_write — yeah. this is the manual override button, no cap 🔥

(it doesn't say why you'd want to, so don't come for me, i'm just the messenger 😭)

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⭐ RETURN ⭐

• 0 on success 💖
• negative errno otherwise 💀

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🌈 SEE ALSO 🌈

the whole extended friend group, fr fr. all of these are kernel file ./drivers/thunderbolt/usb4.c besties:

usb4_switch_check_wakes(9), usb4_switch_setup(9), usb4_switch_configuration_valid(9), usb4_switch_read_uid(9), usb4_switch_drom_read(9), usb4_switch_lane_bonding_possible(9), usb4_switch_set_wake(9), usb4_switch_set_sleep(9), usb4_switch_nvm_sector_size(9), usb4_switch_nvm_read(9), usb4_switch_nvm_write(9), usb4_switch_nvm_authenticate(9), usb4_switch_nvm_authenticate_status(9), usb4_switch_credits_init(9), usb4_switch_query_dp_resource(9), usb4_switch_alloc_dp_resource(9), usb4_switch_dealloc_dp_resource(9), usb4_port_index(9), usb4_switch_map_pcie_down(9), usb4_switch_map_usb3_down(9), usb4_switch_add_ports(9), usb4_switch_remove_ports(9), usb4_port_unlock(9), usb4_port_hotplug_enable(9), usb4_port_reset(9), usb4_port_configure(9), usb4_port_unconfigure(9), usb4_port_configure_xdomain(9), usb4_port_unconfigure_xdomain(9), usb4_port_sb_read(9), usb4_port_sb_write(9), usb4_port_router_offline(9), usb4_port_router_online(9), usb4_port_enumerate_retimers(9), usb4_port_clx_supported(9), usb4_port_asym_supported(9), usb4_port_asym_set_link_width(9), usb4_port_asym_start(9), usb4_port_margining_caps(9), usb4_port_hw_margin(9), usb4_port_sw_margin(9), usb4_port_sw_margin_errors(9), usb4_port_retimer_set_inbound_sbtx(9), usb4_port_retimer_unset_inbound_sbtx(9), usb4_port_retimer_is_last(9), usb4_port_retimer_is_cable(9), usb4_port_retimer_nvm_sector_size(9), usb4_port_retimer_nvm_set_offset(9), usb4_port_retimer_nvm_write(9), usb4_port_retimer_nvm_authenticate(9), usb4_port_retimer_nvm_authenticate_status(9), usb4_port_retimer_nvm_read(9), usb4_usb3_port_max_link_rate(9), usb4_usb3_port_allocated_bandwidth(9), usb4_usb3_port_allocate_bandwidth(9), usb4_usb3_port_release_bandwidth(9), usb4_dp_port_set_cm_id(9), usb4_dp_port_bandwidth_mode_supported(9), usb4_dp_port_bandwidth_mode_enabled(9), usb4_dp_port_set_cm_bandwidth_mode_supported(9), usb4_dp_port_group_id(9), usb4_dp_port_set_group_id(9), usb4_dp_port_nrd(9), usb4_dp_port_set_nrd(9), usb4_dp_port_granularity(9), usb4_dp_port_set_granularity(9), usb4_dp_port_set_estimated_bandwidth(9), usb4_dp_port_allocated_bandwidth(9), usb4_dp_port_allocate_bandwidth(9), usb4_dp_port_requested_bandwidth(9), usb4_pci_port_set_ext_encapsulation(9), usb4_pci_port_ltssm_state(9)

like i said. the whole group chat 🫶💜

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and that's the page!! 🎀 ok so the little sign-off at the bottom said this came out of ./drivers/thunderbolt, dated October 2026, under the Kernel API Manual — so yeah, cute lil thunderbolt directory, future-dated, iconic. iykyk 💅✨