__genwqe_search_mapping(9)

📦 version 7.3.1, in nixpkgs unstable

💖 __genwqe_search_mapping — NAME 💖

okay so bestie, this is the page for __genwqe_search_mapping from the Kernel API Manual (section 9, kernel-space girlies only 💅), and it does exactly one thing: it searches for the mapping that belongs to a userspace address. that's it. that's the whole vibe. 🎀

✨ SYNOPSIS ✨

struct dma_mapping * __genwqe_search_mapping (struct genwqe_file *cfile
, unsigned long u_addr , unsigned int size , dma_addr_t *dma_addr , void
**virt_addr );

like, five arguments, one return, no cap. copy it exactly, don't get creative with the line breaks bestie 😭

🫶 ARGUMENTS 🫶

  • cfile — the descriptor of the opened file. it's giving "the file that got opened" energy, no notes 💖
  • u_addr — the user virtual address. the address, but make it userspace ✨
  • size — the size of the buffer. how much buffer we're buffering 🌸
  • dma_addr — a DMA address that's gonna get updated. so it goes in, it comes back different, iykyk 💫
  • virt_addr — a virtual address that also gets updated. same deal, gets filled in for you 🐛

👑 RETURN 👑

you get back a pointer to the corresponding mapping — the one that matches the address you asked about 🎯 and if nothing's found? you get NULL. not found = nothing for you, bestie 💀 periodt.

🌈 SEE ALSO 🌈

kernel file ./drivers/misc/genwqe/card_dev.c (yes, that's where the whole friend group lives 🏠) plus this entire squad right here:

like a whole group chat of genwqe functions and honestly? obsessed 🦋

and that's the page!! 💜 huge shoutout to ./drivers/misc/genwqe for hosting this whole situation and to October 2026 for the timestamp — slay, see you in the kernel tree, mwah 🧚‍♀️🎀🔥

📦 where this page comes from