it821x_passthru_set_dmamode(9)

💖 it821x_passthru_set_dmamode(9) 💖

okay bestie, welcome to the Kernel API Manual entry for it821x_passthru_set_dmamode — it's giving “set initial DMA mode data” and we're gonna get into it 💅✨

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🌸 NAME 🌸

it821x_passthru_set_dmamode — set initial DMA mode data 🎀

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✨ SYNOPSIS ✨

void it821x_passthru_set_dmamode (struct ata_port *ap , struct
       ata_device *adev );

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🎀 ARGUMENTS 🎀

• ap — the ATA interface, slay 🦋
• adev — the ATA device, iconic 💖

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🦋 DESCRIPTION 🦋

So this function sets up the DMA modes, periodt. The actions it takes depend heavily on the mode we're gonna use, fr fr.

If UDMA is used — as is hopefully the usual case — then the timing register is private and we only need to consider the clock ⏰✨. If we're using MWDMA, then we have to manage the setting ourself as we switch devices and mode 😭💀.

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👑 SEE ALSO 👑

Kernel file ./drivers/ata/pata_it821x.c and all these besties:

• it821x_program(9)
• it821x_program_udma(9)
• it821x_clock_strategy(9)
• it821x_passthru_set_piomode(9)
• it821x_passthru_bmdma_start(9)
• it821x_passthru_bmdma_stop(9)
• it821x_passthru_dev_select(9)
• it821x_smart_qc_issue(9)
• it821x_passthru_qc_issue(9)
• it821x_smart_set_mode(9)
• it821x_dev_config(9)
• it821x_read_id(9)
• it821x_check_atapi_dma(9)
• it821x_display_disk(9)
• it821x_firmware_command(9)
• it821x_probe_firmware(9)
• it821x_port_start(9)
• it821x_rdc_cable(9)

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and that's the whole vibe 🫶 this one lives in ./drivers/ata, dated October 2026, and it's literally it821x_passthru_set_dmamode(9) — bye bestie, go slay those DMA modes 💖🌈👑