ice_tx_map(9)

🦋 ice_tx_map(9) — the Kernel API Manual, bestie edition 🦋

okay so this is a page from the Kernel API Manual (section 9, kernel-space functions, iykyk) and it's literally about building a Tx descriptor. it's giving "small function, big job" energy and i'm obsessed 💖

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✨ SYNOPSIS ✨

void ice_tx_map (struct ice_tx_ring *tx_ring , struct ice_tx_buf *first
, struct ice_tx_offload_params *off );

no cap, that's the whole signature — it returns void, so it's not gonna hand you back a value, it just does the thing 💅

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🎀 ARGUMENTS 🎀

• tx_ring — the ring you're sending the buffer on. like, the destination, the vibe, the place it all goes down ✨
• first — the first buffer info buffer to use. it's the entry point, the main character of the buffer situation 👑
• off — a pointer to the struct that holds the offload parameters. all the offload-y details live in there 🫶

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🌸 DESCRIPTION 🌸

so here's the tea, bestie 🍓 — this function loops over the skb data that *first points to. for each memory location it grabs a physical address, then it programs that physical address and the length straight into the transmit descriptor. that's it, that's the whole job, and it does it slayfully 💀✨

like, it's literally turning your scattered memory locations into nice tidy descriptor entries. no notes, ate 💅

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🌈 SEE ALSO 🌈

first up, the source file itself, right here in the kernel tree:

• Kernel file ./drivers/net/ethernet/intel/ice/ice_txrx.c

and then a whole friend group of related functions — every single one of them, in order, no skipping 🙈:

• ice_prgm_fdir_fltr(9)
• ice_unmap_and_free_tx_buf(9)
• ice_clean_tstamp_ring(9)
• ice_free_tstamp_ring(9)
• ice_free_tx_tstamp_ring(9)
• ice_clean_tx_ring(9)
• ice_free_tx_ring(9)
• ice_clean_tx_irq(9)
• ice_alloc_tstamp_ring(9)
• ice_setup_tstamp_ring(9)
• ice_alloc_setup_tstamp_ring(9)
• ice_setup_tx_ring(9)
• ice_clean_rx_ring(9)
• ice_free_rx_ring(9)
• ice_setup_rx_ring(9)
• ice_run_xdp(9)
• ice_xmit_xdp_ring(9)
• ice_xdp_xmit(9)
• ice_init_ctrl_rx_descs(9)
• ice_alloc_rx_bufs(9)
• ice_clean_ctrl_rx_irq(9)
• ice_clean_rx_irq(9)
• ice_net_dim(9)
• ice_buildreg_itr(9)
• ice_enable_interrupt(9)
• ice_set_wb_on_itr(9)
• ice_napi_poll(9)
• __ice_maybe_stop_tx(9)
• ice_maybe_stop_tx(9)
• ice_tx_csum(9)
• ice_tx_prepare_vlan_flags(9)
• ice_tso(9)
• ice_txd_use_count(9)
• ice_xmit_desc_count(9)
• __ice_chk_linearize(9)
• ice_chk_linearize(9)
• ice_tstamp(9)
• ice_xmit_frame_ring(9)
• ice_start_xmit(9)
• ice_get_dscp_up(9)
• ice_clean_ctrl_tx_irq(9)

seriously, if you're poking at Tx descriptor stuff, this list is your group chat. go say hi 🫶

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💜 the cute sign-off 💜

this lil masterpiece lives over in ./drivers/net/ethernet/intel/ice and it's dated October 2026 — so yeah, we're reading from the future, ngl 😭⭐ anyway bestie, go build those descriptors, you're gonna slay 🔥👑💖