drm_gem_dma...nmapped_area(9)

📦 version 7.3.1, in nixpkgs unstable

💅 drm_gem_dma_get_unmapped_area — NAME

okay so bestie, this is the Kernel API Manual page for drm_gem_dma_get_unmapped_area(9) — the function that proposes an address for mapping in noMMU cases. Yes, "noMMU" — it's giving microcontroller energy and honestly we stan 🎀

✨ SYNOPSIS ✨

unsigned long drm_gem_dma_get_unmapped_area (struct file *filp ,
unsigned long addr , unsigned long len , unsigned long pgoff , unsigned
long flags );

that's it, that's the whole vibe check. five args, one unsigned long coming back at you 🦋

🌸 ARGUMENTS 🌸

  • filp — the file object, aka the lil handle doing the whole "who dis" thing 💖
  • addr — memory address. the address. in memory. that's the whole job 🫶
  • len — buffer size, so we know how much we're dealing with 📏
  • pgoff — page offset. very page. much offset 🎀
  • flags — memory flags, the little sprinkle of seasoning on top 🌈

💅 DESCRIPTION 💅

so here's the tea, bestie: this function lives on noMMU platforms and its whole main character moment is proposing an address mapping for a given buffer ✨

and like — the intended usage? it's meant to be used as a direct handler for the struct file_operations.get_unmapped_area operation. no middleman, no extra steps, straight into the slot. lowkey iconic honestly 👑

🔥 RETURN 🔥

  • mapping address — on success, slay 🎉
  • a negative error code — on failure, and we do NOT talk about that 🙈

🧚 SEE ALSO 🧚

Kernel file ./drivers/gpu/drm/drm_gem_dma_helper.c plus this whole friend group right here:

heads up bestie: this page is filed under ./drivers/gpu/drm, dated October 2026 💀 — future-coded of it, honestly. anyway ily, go map some addresses responsibly 🍓💜 periodt.
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