sba_get_iommu(9)

🌸 sba_get_iommu(9) 🌸

okay bestie, welcome to the Kernel API Manual — this one's a little kernel function from the parisc world and it's honestly so chill, let's get into it 💅

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✨ NAME ✨

sba_get_iommu — hands you the iommu pointer for the pci bus controller, no cap 🫶

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🦋 SYNOPSIS 🦋

void * sba_get_iommu (struct parisc_device *pci_hba );

like, that's the whole signature. one argument, one pointer back. iconic behaviour honestly ✨

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🎀 ARGUMENTS 🎀

• pci_hba — the parisc device. yeah that's it, that's the whole vibe. it's the thing you're passing in so the function knows which controller you're talking about 💖

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🌈 DESCRIPTION 🌈

so the way this works is — sba_get_iommu returns the appropriate IOMMU data for the given parisc PCI controller. that's the whole job. it's giving "i have one (1) responsibility and i do it well" 😌

and then, lowkey the important part: this result is cached and used later for PCI DMA Mapping. so it's not just a one-time cute little lookup, it's the thing that shows up again later when the DMA mapping needs it. main character energy fr fr 👑

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👑 SEE ALSO 👑

bestie you're gonna want to peek at the kernel file ./drivers/parisc/sba_iommu.c — that's where all this lives 🧚 and while you're there, the whole sba squad is worth a look:

• sba_dump_ranges(9)
• sba_dump_tlb(9)
• sba_dump_pdir_entry(9)
• sba_check_pdir(9)
• sba_dump_sg(9)
• sba_search_bitmap(9)
• sba_alloc_range(9)
• sba_free_range(9)
• sba_io_pdir_entry(9)
• sba_mark_invalid(9)
• sba_dma_supported(9)
• sba_map_single(9)
• sba_unmap_phys(9)
• sba_alloc(9)
• sba_free(9)
• sba_map_sg(9)
• sba_unmap_sg(9)
• sba_directed_lmmio(9)
• sba_distributed_lmmio(9)

also the kernel file lives at ./drivers/parisc — that's the directory, iykyk 📁✨

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and that's the page! came from ./drivers/parisc, dated October 2026, and it's sba_get_iommu(9) — slay, go read some parisc source, ily, bye 💜🎀🦋