efar_set_dmamode(9)

📦 version 7.3.1, in nixpkgs unstable

💅 efar_set_dmamode(9) 💅

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function page and it's genuinely iconic in a quiet, behind-the-scenes way — think main character energy but for PATA DMA timings 🎀

🌸 NAME 🌸

efar_set_dmamode — initialize host controller PATA DMA timings 🦋

like, that's the whole vibe. it sets up the DMA timing stuff on the host controller. no cap.

✨ SYNOPSIS ✨

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

yes it returns void, so don't go looking for a return value, there isn't one, she simply does her thing and leaves 💅

🫶 ARGUMENTS 🫶

  • ap — the port whose timings we're configuring, like this is the port we're giving a little makeover to 💖
  • adev — the device to program, aka the one actually getting the glow-up 🌟

👑 DESCRIPTION 👑

Set UDMA/MWDMA mode for device, in host controller PCI config space. 🎀 literally that's it, she goes in and sets the UDMA/MWDMA mode for the device, and it happens in the host controller PCI config space. slay.

LOCKING: None (inherited from caller). ⚠️ so she does not do any locking herself, she inherits it from whoever called her — if you're the caller, the locking is your problem bestie, don't come for her 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/ata/pata_efar.c — go read it, iykyk 👀

like the whole friend group fr fr 🫶

⭐ sign-off ⭐

and that's the page!! 🦋 this little gem lives under ./drivers/ata, and she's dated October 2026 — go off, bestie 💜✨🎀

📦 where this page comes from