axienet_eth...set_coalesce(9)

💅 NAME 💅

axienet_ethtools_set_coalesce — okay so this is the function that sets the DMA interrupt coalescing count. That's it, that's the whole name, slay ✨

(this one lives in the Kernel API Manual, just so you know what you're reading 🫶)

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🌸 SYNOPSIS 🌸

int axienet_ethtools_set_coalesce (struct net_device *ndev , struct
       ethtool_coalesce *ecoalesce , struct kernel_ethtool_coalesce
       *kernel_coal , struct netlink_ext_ack *extack );

Bestie look at that signature. Four pointers. Four. It's giving "my function takes the whole friend group" energy 😭

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🎀 ARGUMENTS 🎀

• ndev — pointer to net_device structure. yes the classic. the main character of netdev land 👑
• ecoalesce — pointer to ethtool_coalesce structure
• kernel_coal — ethtool CQE mode setting structure
• extack — extack for reporting error messages. it's the one who tells you what went wrong, very considerate of it ngl 💖

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🦋 DESCRIPTION 🦋

So what does this actually do? It implements the ethtool command for setting the DMA interrupt coalescing count on the Tx and Rx paths. Both. Not one. Both. periodt 💅

And here's the fun part — you can trigger this whole thing from your linux prompt by running:

ethtool -C ethX rx-frames 5

That's literally the incantation. Type it, and this function wakes up and does its thing. iconic behavior honestly 🌈

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⭐ RETURN ⭐

• 0 — on success 🎉
• Non-zero error value — on failure 💀

(no in-between, no "maybe", it's a yes or a no and I respect the commitment)

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🔥 SEE ALSO 🔥

Okay this list is long long. Like, this function knows everybody. But every single one of them deserves their moment, so here we go, no skipping, no cap 🫶

First, the source file itself:

• Kernel file ./drivers/net/ethernet/xilinx/xilinx_axienet_main.c

Now the whole extended friend group:

• 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_free_tx_chain(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_dma_err_handler(9), axienet_probe(9)

See? Everybody. Literally everybody showed up to the function's party 🎊

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ngl if you're poking at coalescing counts in a Xilinx AXI Ethernet driver, you already know what you're doing — this page is just here to hype you up while you do it 💜

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and that's the wrap, bestie 🧚 this little page came from ./drivers/net/ethernet/xilinx, dated October 2026, and it'll be right here whenever you need it again. mwah 💋