iommufd_device_unbind(9)

✨ iommufd_device_unbind(9) ✨

okay bestie, this page is from the Kernel API Manual, and it's literally the cleanup bestie to iommufd_device_bind() — the “undo” moment for binding a device to iommufd. 🫶

🎀 NAME 🎀

iommufd_device_unbind - Undo iommufd_device_bind()

💅 SYNOPSIS 💅

void iommufd_device_unbind (struct iommufd_device *idev );

🌸 ARGUMENTS 🌸

• idev — Device returned by iommufd_device_bind.

🦋 DESCRIPTION 🦋

So what's the vibe? It releases the device from iommufd control. The DMA ownership will return back to unowned with DMA controlled by the DMA API. Slay. ✨

Big huge important thing: this invalidates the iommufd_device pointer, so other APIs that consume it must not be called concurrently. Not me warning you twice, but… do not do that. 💀

🔥 SEE ALSO 🔥

Kernel file ./drivers/iommu/iommufd/device.c, plus these besties:

• iommufd_device_bind(9)
• iommufd_ctx_has_group(9)
• iommufd_device_attach(9)
• iommufd_device_replace(9)
• iommufd_device_detach(9)
• iommufd_access_create(9)
• iommufd_access_destroy(9)
• iommufd_access_notify_unmap(9)
• iommufd_access_unpin_pages(9)
• iommufd_access_pin_pages(9)
• iommufd_access_rw(9)

xoxo, from ./drivers/iommu/iommufd, October 2026, with all the iommufd_device_unbind(9) energy 💖