iommu_fill_pdir(9)

💖 iommu_fill_pdir(9) 💖

okay bestie, welcome to the Kernel API Manual — today’s main character is iommu_fill_pdir(9), and she is ready to spill 💅✨

✨ NAME ✨

iommu_fill_pdir — Insert coalesced scatter/gather chunks into the I/O Pdir. periodt 🎀

🦋 SYNOPSIS 🦋

okay so here’s the exact signature — copy it character for character, pls and thank you 🫶

unsigned int iommu_fill_pdir (struct ioc *ioc , struct scatterlist *startsg , int nents , unsigned long hint , void (*iommu_io_pdir_entry)(__le64 *, space_t, phys_addr_t, unsigned long) );

🌸 ARGUMENTS 🌸

• ioc — The I/O Controller. yes, that one 👑
• startsg — The scatter/gather list of coalesced chunks. iconic list energy ✨
• nents — The number of entries in the scatter/gather list. count ’em 🔢
• hint — The DMA Hint. just a hint, bestie 💅
• iommu_io_pdir_entry — the manpage literally says -- undescribed -- 😭🙈 so that’s all we’re getting; no cap.

💖 DESCRIPTION 💖

okay so here’s the tea: this function inserts the coalesced scatter/gather list chunks into the I/O Controller’s I/O Pdir. that’s it, that’s the function — lowkey straightforward, highkey important 🎀

🔥 SEE ALSO 🔥

• Kernel file ./drivers/parisc/iommu-helpers.h — go read the source, bestie, it’s giving required reading 📚✨

mwah 💋 — source/version: ./drivers/parisc, dated October 2026. that’s the cute sign-off, bestie 🫶🌈