sge_rx_timer_cb(9)

✨ sge_rx_timer_cb(9) ✨

okay bestie, this one's from the Kernel API Manual — yes, we're in kernel-land today, put your hair up 💅

---

🎀 NAME 🎀

sge_rx_timer_cb — the girl who shows up on a schedule to do periodic maintenance of SGE RX queues 🧹✨

---

🌸 SYNOPSIS 🌸

void sge_rx_timer_cb (struct timer_list *t );

---

🦋 ARGUMENTS 🦋

• t — the Rx timer, that's her whole personality here 🫶

---

💖 DESCRIPTION 💖

So here's the vibe: this function runs periodically from a timer to perform maintenance of SGE RX queues. Lowkey the cleanup crew of the kernel, no cap 🌈

• a) Replenishes RX queues that have run out due to memory shortage. Normally, new RX buffers get added when the existing ones are consumed — but when you're out of memory, a queue can literally just become empty 😭. So we schedule NAPI to do the actual refill. Not us doing the refill ourselves, bestie, we just schedule it. Delegation is self-care 👑

---

🔥 SEE ALSO 🔥

First up, the kernel file, character for character:

./drivers/net/ethernet/chelsio/cxgb4vf/sge.c

and then her whole friend group, in order, no one gets left out 🫶:

• 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)
• t4vf_ethrx_handler(9)
• is_new_response(9)
• restore_rx_bufs(9)
• rspq_next(9)
• process_responses(9)
• napi_rx_handler(9)
• t4vf_intr_handler(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)

---

and that's the whole page, bestie — go read sge_tx_timer_cb(9) next, she's the twin sister 💜

mwah 💋 this lil page lives at ./drivers/net/ethernet/chelsio... and it's dated October 2026 — iconic, timeless, periodt. 👑🎀