ttm_tt_init(9)

📦 version 7.3.1, in nixpkgs unstable

✨ ttm_tt_init(9) ✨

okay bestie, so this is a page straight out of the Kernel API Manual (yes, that's the manual name, we're doing kernel internals today, buckle up) 🎀 and it's about a little function called ttm_tt_init. she's short, she's sweet, she has no NAME description and honestly? iconic of her.

🌸 NAME 🌸

ttm_tt_init — (and that's literally it, the description line is empty, the man page is being mysterious and giving nothing, we love a cryptic queen) 💅

⭐ SYNOPSIS ⭐

int ttm_tt_init (struct ttm_tt *ttm , struct ttm_buffer_object *bo ,
       uint32_t page_flags , enum ttm_caching caching , unsigned long
       extra_pages );

five arguments, one int coming back at you, no cap. 🔥

💖 ARGUMENTS 💖

  • ttm — the struct ttm_tt. that's the thing. the star of the show. she's the whole point of this function, bestie.
  • bo — the buffer object we create the ttm for. your ttm needs a bo like you need your iced coffee. ☕
  • page_flags — page flags as identified by the TTM_TT_FLAG_XX flags. XX like the flags, not like… anything else, bestie. 🙈
  • caching — the desired caching state of the pages. it's giving "how do you want your pages cached" energy.
  • extra_pages — extra pages needed for the driver. yes, extra. a little bonus. a lil treat. 🍓

🦋 DESCRIPTION 🦋

so the vibe here is: you create a struct ttm_tt to back data with system memory pages. that's it, that's the job. ✨

but — and this is the part where I need you to pay attention, bestie — no pages are actually allocated. zero. none. the ttm is out here full of potential and absolutely no follow-through. it's giving "I'll do it later" energy, and honestly? valid. 😭💀

🌈 RETURN 🌈

  • NULL: out of memory. that's the whole list. one (1) sad return value, and it's the bad one. if you see NULL, the memory said "no ❤️". 🫶

👑 SEE ALSO 👑

okay this is the friend group, the whole squad, the linkage, if you will. all of these live in the kernel file ./include/drm/ttm/ttm_tt.h:

go read those next, iykwimaityd 💜🧚

PSA: this page came from the ./include/drm/ttm directory and it's dated October 2026 — yes, the future, don't question it, she's ahead of her time ⭐ slay, and that's the whole man page, mwah 💋✨
📦 where this page comes from