vme_dma_request(9)

📦 version 7.3.1, in nixpkgs unstable

💅 vme_dma_request(9) — like, the VME DMA controller request page, bestie ✨

okay so real talk, this one lives in the Kernel API Manual, and it's the page for vme_dma_request(9). it's short, it's sweet, and it's literally the "hey kernel, can I borrow a DMA controller please 🥺" call. let's get into it 🌸

✨ NAME ✨

vme_dma_request — request a DMA controller. that's it, that's the whole vibe 🎀

🦋 SYNOPSIS 🦋

struct vme_resource * vme_dma_request (struct vme_dev *vdev , u32 route );

she takes two things and gives you back a pointer to a struct vme_resource — or nothing at all. no cap 😭

🍓 ARGUMENTS 🍓

  • vdev — pointer to the VME device struct vme_dev that's been assigned to your driver instance. like, your device. the one you're claiming 🫶
  • route — the required src/destination combination. so basically you tell her which two things you want to move data between, and she checks that combo is even a thing 👑

💜 DESCRIPTION 💜

okay so here's the deal: you call this when you want a VME DMA controller that actually has the capability to perform transfers between the source/destination combination you asked for in route. it's giving "matchmaker but for hardware" 💖

you're not configuring anything yet, you're not moving any bytes yet — you're just requesting the controller that can do the combo you want. main character energy, honestly ✨

🔥 RETURN 🔥

  • pointer to a VME DMA resource on success 🎉 slay
  • NULL on failure 💀 (and yes, bestie, you must check for the NULL — do not just raw-dog that pointer, i'm begging 🙈)

🌈 SEE ALSO 🌈

kernel file ./drivers/staging/vme_user/vme.c, plus the whole friend group of VME functions, fr fr:

💡 tiny note bestie: don't forget vme_dma_free(9) exists for when you're done with whatever vme_dma_request handed you 🧚 that's just the list being a good friend, i'm not adding anything, promise 💅

and that's the page!! mwah 😘 this one comes out of ./drivers/staging/vme_user, dated October 2026 — screenshot it, cite it, cite it in your commit message, idc, go off 👑💖

📦 where this page comes from