stmmac_start_tx_dma(9)

💅 NAME 💅

stmmac_start_tx_dma — start TX DMA channel ✨

okay so welcome to the Kernel API Manual (section 9, obviously), and today's main character is literally just a function whose entire job is to start a TX DMA channel. that's it. that's the gig. 🫶

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🎀 SYNOPSIS 🎀

void stmmac_start_tx_dma (struct stmmac_priv *priv , u32 chan );

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🌸 ARGUMENTS 🌸

• priv — the driver private structure, aka the big bag of state the driver carries around everywhere. iconic. 💖
• chan — the TX channel index, like... which channel we're talking about. very u32 of it. ✨

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🦋 DESCRIPTION 🦋

This starts a TX DMA channel. no cap, that's the whole description, and honestly? sometimes a function is exactly what it says on the tin. she's not complicated, she's not doing side quests, she starts a TX DMA channel and she goes home. 🔥

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👑 SEE ALSO 👑

the kernel file for this one lives at ./drivers/net/ethernet/stmicro/stmmac/stmmac_main.c — go read it, bestie, iykyk 🧚

and now the extended friend group, in the order the manual gave them to us (do NOT come for me about the order):

• stmmac_set_clk_tx_rate(9), stmmac_axi_blen_to_mask(9), stmmac_verify_args(9), stmmac_disable_all_queues(9), stmmac_enable_all_queues(9), stmmac_rx_dirty(9)
• stmmac_try_to_start_sw_lpi(9), stmmac_stop_sw_lpi(9), stmmac_eee_ctrl_timer(9), stmmac_hwtstamp_set(9), stmmac_hwtstamp_get(9), stmmac_init_tstamp_counter(9), stmmac_init_timestamping(9)
• stmmac_mac_flow_ctrl(9), stmmac_check_pcs_mode(9), stmmac_init_phy(9)
• stmmac_clear_rx_descriptors(9), stmmac_clear_tx_descriptors(9), stmmac_clear_descriptors(9), stmmac_init_rx_buffers(9), stmmac_free_rx_buffer(9), stmmac_free_tx_buffer(9)
• dma_free_rx_skbufs(9), dma_free_rx_xskbufs(9), __init_dma_rx_desc_rings(9), __init_dma_tx_desc_rings(9), init_dma_desc_rings(9), dma_free_tx_skbufs(9), stmmac_free_tx_skbufs(9)
• __free_dma_rx_desc_resources(9), __free_dma_tx_desc_resources(9), __alloc_dma_rx_desc_resources(9), __alloc_dma_tx_desc_resources(9), alloc_dma_desc_resources(9), free_dma_desc_resources(9)
• stmmac_mac_enable_rx_queues(9), stmmac_start_rx_dma(9), stmmac_stop_rx_dma(9), stmmac_stop_tx_dma(9), stmmac_start_all_dma(9), stmmac_stop_all_dma(9)
• stmmac_dma_operation_mode(9), stmmac_tx_clean(9), stmmac_tx_err(9), stmmac_set_dma_operation_mode(9), stmmac_dma_interrupt(9), stmmac_mmc_setup(9), stmmac_get_hw_features(9)
• stmmac_check_ether_addr(9), stmmac_init_dma_engine(9), stmmac_tx_timer(9), stmmac_init_coalesce(9)
• stmmac_set_tx_queue_weight(9), stmmac_configure_cbs(9), stmmac_rx_queue_dma_chan_map(9), stmmac_mac_config_rx_queues_prio(9), stmmac_mac_config_tx_queues_prio(9), stmmac_mac_config_rx_queues_routing(9), stmmac_mtl_configuration(9)
• stmmac_hw_setup(9), stmmac_setup_dma_desc(9), __stmmac_open(9), stmmac_release(9)
• stmmac_tso_allocator(9), stmmac_tso_xmit(9), stmmac_has_ip_ethertype(9), stmmac_xmit(9), stmmac_rx_refill(9), stmmac_rx(9)
• stmmac_tx_timeout(9), stmmac_set_rx_mode(9), stmmac_change_mtu(9), stmmac_interrupt(9), stmmac_ioctl(9)
• stmmac_hw_init(9), stmmac_dvr_probe(9), stmmac_dvr_remove(9), stmmac_suspend(9), stmmac_reset_queues_param(9), stmmac_resume(9)

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that's all 80 of them bestie, don't @ me, i counted twice 💀

and finally, the ~credits~ moment: this page comes from ./drivers/net/ethernet/stmicro..., dated October 2026. slay, see you in the next channel 💜🎀🦋