pci_enable_ats(9)

💅 pci_enable_ats — pci_enable_ats(9)

okay so bestie, welcome to the Kernel API Manual ✨ this one's a little function from pci_enable_ats(9) and honestly? it's giving short-and-sweet. let's get into it 🫶

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✨ NAME ✨

pci_enable_ats — literally just enable the ATS capability 💅 no cap, that's the whole job.

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🦋 SYNOPSIS 🦋

int pci_enable_ats (struct pci_dev *dev , int ps );

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🎀 ARGUMENTS 🎀

• dev — the PCI device. the main character, the one we're doing all this for 👑
• ps — the IOMMU page shift. yes, that's the shift. the page shift. keep it exactly as-is 🌸

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💖 DESCRIPTION 💖

okay so the vibes here are simple: it returns 0 on success, or negative on failure. that's it. that's the tea 🍓

ngl, "negative on failure" is the whole entire spec here — so like, don't @ me asking for more, it's not in the source 😭

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🌈 SEE ALSO 🌈

it lives in the kernel file ./drivers/pci/ats.c, and it's got a whole friend group fr fr — here's everyone:

• pci_ats_supported(9)
• pci_prepare_ats(9)
• pci_disable_ats(9)
• pci_ats_queue_depth(9)
• pci_ats_page_aligned(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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and that's the whole page, bestie 🧚 this lil gem comes to you straight from ./drivers/pci in the Kernel API Manual, dated October 2026 — icon behavior, no notes 💜✨