axienet_free_tx_chain(9)

💖 axienet_free_tx_chain(9) 💖

okay so first things first, the vibe check: this is a page from the Kernel API Manual, and it's literally all about axienet_free_tx_chain, which — no cap — cleans up a whole series of linked TX descriptors. bestie, it's the janitor of the transmit ring and it does it gorgeously 🧹✨

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✨ NAME ✨

axienet_free_tx_chain — Clean up a series of linked TX descriptors. 🎀

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🌸 SYNOPSIS 🌸

int axienet_free_tx_chain (struct axienet_local *lp , u32 first_bd , int
nr_bds , bool force , u32 *sizep , int budget );

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🦋 ARGUMENTS 🦋

• lp — Pointer to the axienet_local structure. yes, the main character struct 💅
• first_bd — Index of the first descriptor to clean up. start here, queen.
• nr_bds — Max number of descriptors to clean up. it's giving "how many can we handle" energy.
• force — Whether to clean descriptors even if not complete. lowkey aggressive but valid.
• sizep — Pointer to a u32 accumulating the total byte count of completed packets (using skb->len). ⚠️ Ignored if NULL — so don't come crying if you pass nothing.
• budget — NAPI budget (use 0 when not called from NAPI poll). fr fr, 0 is the move there.

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🔥 DESCRIPTION 🔥

Would either be called after a successful transmit operation, or after there was an error when setting up the chain. that's it, that's the whole plot — clean up after the good vibes or the mess, either way bestie's on it 🫶

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⭐ RETURN ⭐

The number of packets handled. slay, a count 🎉

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👑 SEE ALSO 👑

if you wanna go down the rabbit hole, the source of truth is the kernel file ./drivers/net/ethernet/xilinx/xilinx_axienet_main.c — the whole friend group lives there:

• axienet_dma_in32(9)
• axienet_dma_bd_release(9)
• axienet_calc_cr(9)
• axienet_coalesce_params(9)
• axienet_dma_start(9)
• axienet_dma_bd_init(9)
• axienet_set_mac_address(9)
• netdev_set_mac_address(9)
• axienet_set_multicast_list(9)
• axienet_setoptions(9)
• axienet_dma_stop(9)
• axienet_device_reset(9)
• axienet_check_tx_bd_space(9)
• axienet_dma_tx_cb(9)
• axienet_start_xmit_dmaengine(9)
• axienet_tx_poll(9)
• axienet_start_xmit(9)
• axienet_dma_rx_cb(9)
• axienet_rx_poll(9)
• axienet_tx_irq(9)
• axienet_rx_irq(9)
• axienet_eth_irq(9)
• axienet_rx_submit_desc(9)
• axienet_init_dmaengine(9)
• axienet_init_legacy_dma(9)
• axienet_open(9)
• axienet_stop(9)
• axienet_change_mtu(9)
• axienet_poll_controller(9)
• axienet_ethtools_get_drvinfo(9)
• axienet_ethtools_get_regs_len(9)
• axienet_ethtools_get_regs(9)
• axienet_ethtools_get_pauseparam(9)
• axienet_ethtools_set_pauseparam(9)
• axienet_update_coalesce_rx(9)
• axienet_dim_coalesce_count_rx(9)
• axienet_rx_dim_work(9)
• axienet_update_coalesce_tx(9)
• axienet_ethtools_get_coalesce(9)
• axienet_ethtools_set_coalesce(9)
• axienet_dma_err_handler(9)
• axienet_probe(9)

iykyk 💜

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and that's the whole page, bestie — mwah 💋 this lil number lives under ./drivers/net/ethernet/xilinx, dated October 2026, and it's a certified classic. go forth and free those descriptors 🧚‍♀️💖