STRUCT DRM_TEGRA_GEM_MMAP(9)

💖 struct drm_tegra_gem_mmap(9) 💖

okay bestie, so this is a page from the Kernel API Manual and it's literally all about one little struct — struct drm_tegra_gem_mmap — no cap. Think of it as the parameters packet for the GEM mmap IOCTL. She's small, she's specific, she slays. 🎀

✨ SYNOPSIS ✨

struct drm_tegra_gem_mmap {
    __u32 handle;
    __u32 pad;
    __u64 offset;
 };

look at her. three fields. impeccable posture. 🦋

💅 Members 💅

• handle — this is the handle of the GEM object you want to obtain an mmap offset for. like, it's the ID of the thing you're asking about. 👑
• pad — structure padding that may be used in the future. and bestie, it must be 0. not "probably 0". not "0-ish". 0. set it to 0 and move on. 🙈
• offset — the mmap offset for the given GEM object. plot twist: you don't set this, the kernel sets it for you upon successful completion of the IOCTL. so don't be out here filling it in yourself, that's not your job, that's the kernel's main character moment. ✨

fr fr, pad must be 0 — that's not a suggestion, that's the rule. 🫶

🌈 SEE ALSO 🌈

Kernel file ./include/uapi/drm/tegra_drm.h struct:

• drm_tegra_gem_create(9)
• struct drm_tegra_syncpt_read(9)
• struct drm_tegra_syncpt_incr(9)
• struct drm_tegra_syncpt_wait(9)
• struct drm_tegra_open_channel(9)
• struct drm_tegra_close_channel(9)
• struct drm_tegra_get_syncpt(9)
• struct drm_tegra_get_syncpt_base(9)
• struct drm_tegra_syncpt(9)
• struct drm_tegra_cmdbuf(9)
• struct drm_tegra_reloc(9)
• struct drm_tegra_waitchk(9)
• struct drm_tegra_submit(9)
• struct drm_tegra_gem_set_tiling(9)
• struct drm_tegra_gem_get_tiling(9)
• struct drm_tegra_gem_set_flags(9)
• struct drm_tegra_gem_get_flags(9)
• DRM_TEGRA_SUBMIT_RELOC_SECTOR_LAYOUT(9)
• DRM_TEGRA_SUBMIT_CMD_GATHER_UPTR(9)
• DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT(9)
• DRM_TEGRA_SUBMIT_CMD_WAIT_SYNCPT_RELATIVE(9)

that's the whole vibe check, bestie — go read the whole fam, they all ate. 💜

sign-off szn 🎀 — this came from ./include/uapi/drm, dated October 2026, and we're obsessed. mwah. 💋