t4vf_ethrx_handler(9)

💅 t4vf_ethrx_handler (9) — Kernel API Manual

okay so this is a page from the Kernel API Manual — section 9, kernel developer vibes only, no mere mortals here 🧚 — and today's main character is t4vf_ethrx_handler, aka the function that handles packets coming in. Let's get into it 💖

---

✨ NAME ✨

t4vf_ethrx_handler — process an ingress ethernet packet 🦋

---

🌸 SYNOPSIS 🌸

int t4vf_ethrx_handler (struct sge_rspq *rspq , const __be64 *rsp ,
       const struct pkt_gl *gl );

bestie, it returns an int, and it takes three things. that's it. that's the whole signature 🎀

---

🎀 ARGUMENTS 🎀

• rspq — the response queue that received the packet 👑 this is the queue, and it is the one that got the packet. periodt.
• rsp — the response queue descriptor holding the RX_PKT message 📬 it's literally holding the message for you, say thank you.
• gl — the gather list of packet fragments 🧩 all the lil pieces of the packet, gathered up.

---

💜 DESCRIPTION 💜

Process an ingress ethernet packet and deliver it to the stack ✨ that's the whole job. packet comes in, packet gets processed, packet goes up to the stack. slay, no cap 💅

---

🔥 SEE ALSO 🔥

not me having to list all of these, but honestly? iconic lineup. the kernel file herself:

• Kernel file ./drivers/net/ethernet/chelsio/cxgb4vf/sge.c

and the whole friend group 💖:

• get_buf_addr(9)
• is_buf_mapped(9)
• need_skb_unmap(9)
• txq_avail(9)
• fl_cap(9)
• fl_starving(9)
• map_skb(9)
• free_tx_desc(9)
• reclaim_completed_tx(9)
• get_buf_size(9)
• free_rx_bufs(9)
• unmap_rx_buf(9)
• ring_fl_db(9)
• set_rx_sw_desc(9)
• refill_fl(9)
• alloc_ring(9)
• sgl_len(9)
• flits_to_desc(9)
• is_eth_imm(9)
• calc_tx_flits(9)
• write_sgl(9)
• ring_tx_db(9)
• inline_tx_skb(9)
• t4vf_eth_xmit(9)
• copy_frags(9)
• t4vf_pktgl_to_skb(9)
• t4vf_pktgl_free(9)
• do_gro(9)
• is_new_response(9)
• restore_rx_bufs(9)
• rspq_next(9)
• process_responses(9)
• napi_rx_handler(9)
• t4vf_intr_handler(9)
• sge_rx_timer_cb(9)
• sge_tx_timer_cb(9)
• bar2_address(9)
• t4vf_sge_alloc_rxq(9)
• t4vf_sge_alloc_eth_txq(9)
• t4vf_free_sge_resources(9)
• t4vf_sge_start(9)
• t4vf_sge_stop(9)
• t4vf_sge_init(9)

go read them, iykyk 🫶

---

ok and finally, the lil sign-off at the bottom: this page lives at ./drivers/net/ethernet/chelsio... (yes it's truncated like that, don't come for me 🙈), it's dated October 2026 ⭐, and the whole thing is filed under t4vf_ethrx_handler(9) because that's the name of the page. bye bestie, go process some ingress packets 💅💖🌈