axienet_check_tx_bd_space(9)

✨ axienet_check_tx_bd_space(9) ✨

okay so bestie, welcome to the axienet_check_tx_bd_space page of the Kernel API Manual — yes that's the whole name, no I will not be shortening it, it's iconic 💅

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🎀 NAME 🎀

axienet_check_tx_bd_space — the little vibe check that tells you whether a BD (or a whole group of BDs) is currently busy 🫶

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🌸 SYNOPSIS 🌸

int axienet_check_tx_bd_space (struct axienet_local *lp , int num_frag );

like, that's the whole signature, periodt ✨

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🦋 ARGUMENTS 🦋

• lp — a pointer to the axienet_local structure, aka the main character of this whole file 🧚
• num_frag — the number of BDs you want to check for. yes, plural, you can ask about a whole little squad of them 💜

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⭐ RETURN ⭐

• 0 — on success, slay 💖
• NETDEV_TX_BUSY — if any of the descriptors are not free 😭 not a single one of them can be busy, fr fr

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🔥 DESCRIPTION 🔥

This function is invoked before BDs are allocated and transmission starts. no cap, it's literally the pre-flight check 🔥

So here's the tea: it returns 0 if a BD or a group of BDs can be allocated for transmission. if the BD — or any single one of the BDs in that group, like even one — is not free, the function hits you with a busy status. it's giving strict group project energy: everyone has to be available or nobody's going anywhere 💀

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👑 SEE ALSO 👑

and now for the whole friend group 🫶 the kernel file lives at ./drivers/net/ethernet/xilinx/xilinx_axienet_main.c, and here's everyone else:

• 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_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)

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🌈 okay that's the whole page, you ate that 💅 this lil masterpiece comes to you from ./drivers/net/ethernet/xilinx, dated October 2026 — mwah, bye bestie! 🍓💜🎀