pci_ats_required(9)

💅 pci_ats_required(9) 💅

okay so this is a page straight out of the Kernel API Manual, and honestly? it's a short one but it eats. let's get into it bestie 🫶

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✨ NAME ✨

pci_ats_required — whether the PCI device requires ATS 🌸

(like, does this device need it to function at all? that's the whole question, no cap)

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✨ SYNOPSIS ✨

bool pci_ats_required (struct pci_dev *pdev );

it returns a bool, it takes one pointer, it's giving minimal and iconic 💅

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✨ ARGUMENTS ✨

• pdev — the PCI device 🎀 (that's it. that's the whole argument list. main character energy fr fr)

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✨ DESCRIPTION ✨

so here's the vibe check: this function returns true if the PCI device requires ATS for basic functional operation. 🔥

like, not "would be nice to have", not "optional upgrade" — required. if it needs ATS just to do its basic job, you get true. otherwise you don't. periodt. 👑

lowkey the most straightforward function in the whole ATS saga and I respect it for that.

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✨ SEE ALSO ✨

the kernel file lives at ./drivers/pci/ats.c and honestly the whole squad is linked here, so let me introduce you 💖

• pci_ats_supported(9)
• pci_prepare_ats(9)
• pci_enable_ats(9)
• pci_disable_ats(9)
• pci_ats_queue_depth(9)
• pci_ats_page_aligned(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)

that's the whole group chat bestie, go read them all 🦋✨

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ngl if you were looking for drama or undefined behaviour, this page has none — just a clean little boolean. sometimes peace is the vibe 🧚

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and that's a wrap!! this came from ./drivers/pci in the gorgeous month of October 2026 — stay slay, stay boolean, and remember: ATS is required for some devices and that's just their truth 💜🎀✨