acpi_dev_get_dma_resources(9)

📦 version 7.3.1, in nixpkgs unstable

💅 acpi_dev_get_dma_resources(9)

okay so bestie, welcome to the Kernel API Manual ✨ this one's a kernel function page, and honestly? it's giving "small but mighty." let's get into it 🫶

✨ NAME ✨

acpi_dev_get_dma_resources — get current DMA resources of a device 💖

🌸 SYNOPSIS 🌸

int acpi_dev_get_dma_resources (struct acpi_device *adev , struct
       list_head *list );

like, that's the whole signature. copy it exactly, no cap 🔥

🎀 ARGUMENTS 🎀

  • adev — the ACPI device node you wanna get the resources for 🦋
  • list — head of the resultant list of resources. and listen, it must be empty — no sneaky leftovers, okay? 🙈

👑 DESCRIPTION 👑

okay so what this actually does: it evaluates the _DMA method for the device node you passed in, and then processes whatever that method spits out ✨

the resultant struct resource objects get put onto the list that list points to — and remember, that list has to be empty at the start, fr fr. they go on there as members of struct resource_entry objects 💫

🚨 bestie heads up: callers of this routine should use acpi_dev_free_resource_list to free that list. don't just leave it hanging, that's not the vibe 💀

and the returns? on success you get the number of resources in the output list back 🔥 otherwise you get an error code that reflects whatever error condition happened, and that's on periodt 😭

🌈 SEE ALSO 🌈

kernel file ./drivers/acpi/resource.c plus these iconic little functions, go check 'em out iykyk:

and that's the page!! 🧚 mwah, slay, go read the whole set 💜

this lil sign-off is brought to you by ./drivers/acpi, dated October 2026, and your girl acpi_dev_get_dma_resources(9) — bye bestie, drink some water and free your resource lists 💖🎀🌸

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