serverworks_osb4_filter(9)

✨ NAME ✨

okay so this is the serverworks_osb4_filter(9) page from the Kernel API Manual, and it’s literally the mode selection filter 💅 — the little function that decides which modes are allowed to stay in the group chat.

🎀 SYNOPSIS 🎀

unsigned int serverworks_osb4_filter (struct ata_device *adev , unsigned int mask );

🦋 ARGUMENTS 🦋

• adev — an ATA device, aka the main character we’re filtering modes for.
• mask — mask of proposed modes, aka the offered modes that are up for the vibe check.

💖 DESCRIPTION 💖

This function filters the offered modes for the device so it can apply controller specific rules ✨.

And here’s the important part, bestie: OSB4 requires no UDMA for disks because of a FIFO bug we hit 😭. No cap, that’s the rule.

👀 SEE ALSO 👀

• Kernel file: ./drivers/ata/pata_serverworks.c
• oem_cable(9)
• serverworks_cable_detect(9)
• serverworks_is_csb(9)
• serverworks_csb_filter(9)
• serverworks_set_piomode(9)
• serverworks_set_dmamode(9)

xoxo, your local kernel girly 💜 — source: ./drivers/ata, date: October 2026, page: serverworks_osb4_filter(9) 🫶