pdc2027x_set_dmamode(9)

💖 pdc2027x_set_dmamode(9) — bestie edition 💖

okay so this is the pdc2027x_set_dmamode(9) page from the Kernel API Manual, and it is lowkey iconic because it’s all about timings. no cap, we’re getting into host controller PATA UDMA timing territory, and I’m gonna walk you through every single detail so you don’t miss a thing 🫶✨

---

✨ NAME ✨

pdc2027x_set_dmamode — Initialize host controller PATA UDMA timings. that’s the vibe, periodt 💅

---

🌸 SYNOPSIS 🌸

here’s the signature, and yes, copy it exactly bestie 🎀

void pdc2027x_set_dmamode (struct ata_port *ap , struct ata_device *adev
);

---

🦋 ARGUMENTS 🦋

• ap — port to configure. literally the port you’re setting up 💖
• adev — um 😭 that’s what it says, bestie. the description is literally um, iykyk.

---

💅 DESCRIPTION 💅

Set UDMA mode for device. that’s it, that’s the whole job ✨ slay.

LOCKING: None (inherited from caller). no extra locking here, it’s inherited from whoever called it, fr fr 🔥

---

👑 SEE ALSO 👑

Kernel file: ./drivers/ata/pata_pdc2027x.c — that’s where this lives, bestie 🧚

Linked faves, all (9) pages:

• port_mmio(9)
• dev_mmio(9)
• pdc2027x_cable_detect(9)
• pdc2027x_port_enabled(9)
• pdc2027x_prereset(9)
• pdc2027x_mode_filter(9)
• pdc2027x_set_piomode(9)
• pdc2027x_set_mode(9)
• pdc2027x_check_atapi_dma(9)
• pdc_read_counter(9)
• pdc_adjust_pll(9)
• pdc_detect_pll_input_clock(9)
• pdc_hardware_init(9)
• pdc_ata_setup_port(9)
• pdc2027x_init_one(9)

---

mwah 💋 — source/version: ./drivers/ata, date: October 2026, page: pdc2027x_set_dmamode(9). byeee bestie 🫶🌈⭐