sis_old_set_dmamode(9)

🎀 NAME 🎀

okay so bestie, this is sis_old_set_dmamode(9) from the Kernel API Manual, and it is literally here to Initialize host controller PATA DMA timings. that’s the whole vibe. 💅✨

✨ SYNOPSIS ✨

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

🫶 ARGUMENTS 🫶

• ap — the port whose timings we are configuring, slay 🎀
• adev — the device to program, no cap 💖

💖 DESCRIPTION 💖

Set UDMA/MWDMA mode for device, in host controller PCI config space. 🌸

It handles pre UDMA and UDMA33 devices. And yes, it supports MWDMA as well — unlike the old ide/pci driver. iconic behavior, honestly. 🔥👑

LOCKING: None (inherited from caller). 🫶

👑 SEE ALSO 👑

Kernel file ./drivers/ata/pata_sis.c — and the whole friend group:

• sis_old_port_base(9)
• sis_port_base(9)
• sis_133_cable_detect(9)
• sis_66_cable_detect(9)
• sis_pre_reset(9)
• sis_set_fifo(9)
• sis_old_set_piomode(9)
• sis_100_set_piomode(9)
• sis_133_set_piomode(9)
• sis_66_set_dmamode(9)
• sis_100_set_dmamode(9)
• sis_133_early_set_dmamode(9)
• sis_133_set_dmamode(9)
• sis_133_mode_filter(9)
• sis_init_one(9)

mwah 💋 this lil page comes from ./drivers/ata, dated October 2026, and the footer title is sis_old_set_dmamode(9) — periodt. 🦋🌈