STRUCT DRM_PANFROST_MMAP_BO(9)

✨ struct drm_panfrost_mmap_bo(9) ✨

Okay bestie, so this is a page straight out of the Kernel API Manual — it's the struct drm_panfrost_mmap_bo(9) page, and honestly? It's a little icon and we're gonna get into it. 🎀

🌸 NAME 🌸

struct drm_panfrost_mmap_bo — the ioctl argument for mapping Panfrost BOs. That's buffer objects, iykyk. 👑

🦋 SYNOPSIS 🦋

struct drm_panfrost_mmap_bo {
    __u32 handle;
    __u32 flags;
    __u64 offset;
 };

💜 Members 💜

• handle — the handle for the object being mapped. This is literally the lil ID of the thing you wanna map, bestie.
• flags — currently not used, and it should be zero. Not me checking twice. 👀
• offset — offset into the drm node to use for subsequent mmap call. Keep this one, you'll need it. 🫶

🌈 Description 🌈

So here's the tea: this does not actually perform an mmap. Nope. What it does instead is return the offset you need to use in an mmap on the DRM device node. The way that this makes tools like valgrind end up knowing about the mapped memory? Chef's kiss. 🔥

There are currently no values for the flags argument, but it may be used in a future extension. So like, don't get attached — it could get a glow-up later. ✨

👑 SEE ALSO 👑

• Kernel file ./include/uapi/drm/panfrost_drm.h
• struct drm_panfrost_submit(9)
• struct drm_panfrost_wait_bo(9)
• struct drm_panfrost_create_bo(9)
• struct drm_panfrost_set_label_bo(9)
• struct drm_panfrost_sync_bo(9)

bestie this struct does not mmap for you, it just tells you where to go. read the offset. no cap. 💅

Okay that's the whole page, mwah 💖 — this gem lives in ./include/uapi/drm, dated October 2026, and it's part of the struct drm_panfrost_mmap_bo(9) era of the Kernel API Manual. Love that for us. 🧚💜