axienet_dma_bd_init(9)

💅 axienet_dma_bd_init (9) — Kernel API Manual, bestie edition 🎀

Okay so this is a page from the Kernel API Manual, and today's main character is axienet_dma_bd_init. Buckle up buttercup, it's giving "DMA rings" and honestly? Iconic.

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✨ NAME ✨

axienet_dma_bd_init — Setup buffer descriptor rings for Axi DMA 🌸

✨ SYNOPSIS ✨

int axienet_dma_bd_init (struct net_device *ndev );

✨ ARGUMENTS ✨

• ndev — Pointer to the net_device structure 🫶 (yes, just the one argument, she's lowkey simple like that)

✨ RETURN ✨

• 0, on success 🎉
• -ENOMEM, on failure 😭

No cap, those are literally the only two outcomes. Either you slayed or you ran out of memory, there is no in-between.

✨ DESCRIPTION ✨

So this function gets called to initialize the Rx and Tx DMA descriptor rings. 🦋 It initializes the descriptors with the required default values — cozy little baseline vibes — and it gets called when the Axi Ethernet driver reset is called. Like, reset happens, this function shows up to set the table again. Periodt. 💅

✨ SEE ALSO ✨

Bestie, the friend group is huge, so let's go:

• Kernel file ./drivers/net/ethernet/xilinx/xilinx_axienet_main.c — that's the home base, iykyk 📁
• axienet_dma_in32(9)
• axienet_dma_bd_release(9)
• axienet_calc_cr(9)
• axienet_coalesce_params(9)
• axienet_dma_start(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_ethtools_set_coalesce(9)
• axienet_dma_err_handler(9)
• axienet_probe(9)

Go read all of them, I'll wait. 💖

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Okay that's the whole page, mwah 💋

Sign-off time: this lil masterpiece lives in ./drivers/net/ethernet/xilinx, dated October 2026, and it's filed under axienet_dma_bd_init(9) in the Kernel API Manual. Slay, go init some rings. 🦋✨👑