stmmac_set_...eration_mode(9)

💅 stmmac_set_dma_operation_mode — a Kernel API Manual moment 🎀

okay so bestie, we're in the Kernel API Manual today and this one is literally about telling the DMA engine how to vibe. stay with me 💖

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✨ NAME ✨

stmmac_set_dma_operation_mode — set the DMA operation mode, per channel, no cap 🦋

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🌸 SYNOPSIS 🌸

void stmmac_set_dma_operation_mode (struct stmmac_priv *priv , u32
txmode , u32 rxmode , u32 chan );

like yes that's the whole signature, she's not hiding anything 💅

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🫶 ARGUMENTS 🫶

• priv — the driver's private structure. her private structure. the main character struct, honestly 👑
• txmode — the TX operating mode, i.e. how the transmit side is gonna behave ✨
• rxmode — the RX operating mode, same energy but for receive 🌸
• chan — the channel index, so you know which channel we're talking about 🔥

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🦋 DESCRIPTION 🦋

so what does she actually do?? she's used for configuring the DMA operation mode at runtime, bestie — like, while everything is already running, not at some cute little setup moment. her whole job is to program the tx/rx DMA thresholds or the Store-And-Forward mode. that's it. that's the vibe. periodt 💜

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💀 SEE ALSO 💀

the friend group is enormous, buckle up 🎀

• Kernel file ./drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
• 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_start_tx_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_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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and that's the whole page, bestie, you ate that 🍓

sign-off time 💌 — this one comes from ./drivers/net/ethernet/stmicro... and it's dated October 2026, living under the stmmac_set_...eration_mode(9) title. mwah 💋✨