STRUCT DRM_ROCKET_PREP_BO(9)

💖 struct drm_rocket_prep_bo(9) 💖

okay so bestie, welcome to the Kernel API Manual ✨ — this is the page for struct drm_rocket_prep_bo, and it's literally the ioctl argument for starting CPU ownership of the BO. yes, THE argument. main character struct energy fr fr 🎀

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🌸 NAME 🌸

struct drm_rocket_prep_bo — the ioctl argument for starting CPU ownership of the BO. that's the whole vibe. that's the assignment. 💅

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✨ SYNOPSIS ✨

struct drm_rocket_prep_bo {
    __u32 handle;
    __u32 reserved;
    __s64 timeout_ns;
 };

look at her. three members. flawless. no notes. 👑

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🦋 Members 🦋

• handle — Input: the GEM handle of the buffer object. this is the which buffer field, iykyk 🔥
• reserved — Reserved, must be zero. and like... she MEANS it, bestie. not "probably zero", not "zero-ish". zero. don't be quirky with this one 🫶
• timeout_ns — Input: the amount of time to wait for NPU jobs. yes the _ns is nanoseconds, she's precise like that ⭐

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🧚 Description 🧚

so what does she actually do? she takes care of waiting for any NPU jobs that might still be using the NPU — like, all of them, no job left behind 😭 — and then she performs cache synchronization. that's it, that's the whole job. waiting + syncing. iconic behaviour honestly 🌈

ngl this is the "bestie hold on, let me make sure nothing's still touching the NPU" step. cache sync included. do not skip her. 💀

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👑 SEE ALSO 👑

• Kernel file ./include/uapi/drm/rocket_accel.h
• struct drm_rocket_create_bo(9)
• struct drm_rocket_fini_bo(9)
• struct drm_rocket_task(9)
• struct drm_rocket_job(9)
• struct drm_rocket_submit(9)

go read the whole friend group, they're all linked and they all slay in their own way 💜🦋🌸

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and that's the page, bestie!! 🎀 this one lives in ./include/uapi/drm, dated October 2026 — mwah, go prep that BO, ily, bye 💖✨🍓