pci_ats_page_aligned(9)

🌸 NAME 🌸

pci_ats_page_aligned — Return Page Aligned Request bit status.

Hiii bestie 💖 welcome to pci_ats_page_aligned(9) from the Kernel API Manual — this is the little function that does the Page Aligned Request bit vibe check ✨

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✨ SYNOPSIS ✨

int pci_ats_page_aligned (struct pci_dev *pdev );

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🎀 ARGUMENTS 🎀

• pdev — the PCI device, periodt 💅

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🦋 DESCRIPTION 🦋

It returns 1 if the Untranslated Addresses generated by the device are always aligned, or 0 otherwise. That's the whole status check, no cap 😌.

Per PCIe spec r4.0, sec 10.5.1.2, if the Page Aligned Request bit is set, it indicates the Untranslated Addresses generated by the device are always aligned to a 4096 byte boundary. Literally iconic spec behavior 🫶

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💜 SEE ALSO 💜

Kernel file ./drivers/pci/ats.c, plus the whole bestie lineup:

• pci_ats_supported(9)
• pci_prepare_ats(9)
• pci_enable_ats(9)
• pci_disable_ats(9)
• pci_ats_queue_depth(9)
• pci_ats_required(9)
• pci_enable_pri(9)
• pci_disable_pri(9)
• pci_restore_pri_state(9)
• pci_reset_pri(9)
• pci_prg_resp_pasid_required(9)
• pci_pri_supported(9)
• pci_enable_pasid(9)
• pci_disable_pasid(9)
• pci_restore_pasid_state(9)
• pci_pasid_features(9)
• pci_max_pasids(9)
• pci_pasid_status(9)

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okay that's the whole page, bestie 🫶 — this one lives under ./drivers/pci, in the Kernel API Manual, dated October 2026, and its name is literally pci_ats_page_aligned(9). slay 💅