i40e_tsyn(9)

💖 i40e_tsyn(9) — like, the tsyn context descriptor setup page 💖

okay so bestie, welcome to the i40e_tsyn page from the Kernel API Manual ✨ this is the little function that sets up the tsyn context descriptor, and honestly? it's giving "tiny but crucial" and we're gonna get through it together, no cap 🫶

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✨ NAME ✨

i40e_tsyn — set up the tsyn context descriptor. that's the whole vibe. it sets up the tsyn context descriptor, periodt 💅

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🌸 SYNOPSIS 🌸

int i40e_tsyn (struct i40e_ring *tx_ring , struct sk_buff *skb , u32
       tx_flags , u64 *cd_type_cmd_tso_mss );

like literally that's the signature, character for character, don't @ me 🔥

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🦋 ARGUMENTS 🦋

four things go in, bestie, and here's the tea on each one 👑

• tx_ring — ptr to the ring to send 💫 (the ring we're yeeting stuff out of, basically)
• skb — ptr to the skb we're sending 🎀 (the packet bestie in question)
• tx_flags — the collected send information 🌈 (all the send deets, gathered up)
• cd_type_cmd_tso_mss — Quad Word 1 ⭐ (yes, that's literally what it is — Quad Word 1)

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💜 DESCRIPTION 💜

so what does it return? here's the whole thing, and it's short and sweet:

Returns 0 if no Tx timestamp can happen and 1 if the timestamp will happen 💅

that's it. that's the description. 0 = no Tx timestamp can happen, 1 = the timestamp will happen. iconic, concise, we love a function that gets to the point 😭✨

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🔥 SEE ALSO 🔥

okay this part is a whole friend group, so buckle up 🧚 the Kernel file lives at ./drivers/net/ethernet/intel/i40e/i40e_txrx.c and here's everybody it's linked with:

i40e_fdir(9), i40e_program_fdir_filter(9), i40e_create_dummy_packet(9), i40e_create_dummy_udp_packet(9), i40e_create_dummy_tcp_packet(9), i40e_create_dummy_sctp_packet(9), i40e_prepare_fdir_filter(9), i40e_change_filter_num(9), i40e_add_del_fdir_udp(9), i40e_add_del_fdir_tcp(9), i40e_add_del_fdir_sctp(9), i40e_add_del_fdir_ip(9), i40e_add_del_fdir(9), i40e_fd_handle_status(9), i40e_unmap_and_free_tx_resource(9), i40e_clean_tx_ring(9), i40e_free_tx_resources(9), i40e_get_tx_pending(9), i40e_detect_recover_hung(9), i40e_clean_tx_irq(9), i40e_enable_wb_on_itr(9), i40e_force_wb(9), i40e_update_itr(9), i40e_reuse_rx_page(9), i40e_clean_programming_status(9), i40e_setup_tx_descriptors(9), i40e_clean_rx_ring(9), i40e_free_rx_resources(9), i40e_setup_rx_descriptors(9), i40e_release_rx_desc(9), i40e_alloc_mapped_page(9), i40e_alloc_rx_buffers(9), i40e_rx_checksum(9), i40e_rx_hash(9), i40e_process_skb_fields(9), i40e_cleanup_headers(9), i40e_can_reuse_rx_page(9), i40e_rx_buffer_flip(9), i40e_get_rx_buffer(9), i40e_put_rx_buffer(9), i40e_process_rx_buffs(9), i40e_construct_skb(9), i40e_build_skb(9), i40e_is_non_eop(9), i40e_run_xdp(9), i40e_xdp_ring_update_tail(9), i40e_update_rx_stats(9), i40e_finalize_xdp_rx(9), i40e_inc_ntp(9), i40e_add_xdp_frag(9), i40e_consume_xdp_buff(9), i40e_clean_rx_irq(9), i40e_buildreg_itr(9), i40e_update_enable_itr(9), i40e_napi_poll(9), i40e_atr(9), i40e_tx_prepare_vlan_flags(9), i40e_tso(9), i40e_tx_enable_csum(9), i40e_create_tx_ctx(9), __i40e_maybe_stop_tx(9), __i40e_chk_linearize(9), i40e_tx_map(9), i40e_xmit_xdp_ring(9), i40e_xmit_frame_ring(9), i40e_lan_xmit_frame(9), i40e_xdp_xmit(9)

like I said — a whole friend group 💀🫶 go say hi to all of them, iykyk.

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and that's the page!! 🎀 source is ./drivers/net/ethernet/intel/i40e, version/date is October 2026, and the page itself is of course i40e_tsyn(9) — mwah, slay, go timestamp something responsibly bestie 💖✨👑