libnvme(9)

💅 libnvme(9)

okay bestie, welcome to the libnvme API manual ✨ this one's a little slice of it — the enum nvme_pma page, and yes the whole thing is about Power Measurement Attributes (PMA) fields. it's giving "bit-shifting but make it fashion" 🎀 don't worry, it's short, we'll get through it together.

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🌸 NAME 🌸

enum nvme_pma — the Power Measurement Attributes (PMA) field 💖 literally the enum where all your PMA bit math lives.

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✨ SYNOPSIS ✨

here's the whole enum, copy it exactly bestie, no typos or it's over for us 😭

enum nvme_pma {
    NVME_PMA_PME_SHIFT ,
    NVME_PMA_NCPDF_SHIFT ,
    NVME_PMA_EPF_SHIFT ,
    NVME_PMA_MIPWRTS_SHIFT ,
    NVME_PMA_PHDO_SHIFT ,
    NVME_PMA_PMT_SHIFT ,
    NVME_PMA_PME_MASK ,
    NVME_PMA_NCPDF_MASK ,
    NVME_PMA_EPF_MASK ,
    NVME_PMA_MIPWRTS_MASK ,
    NVME_PMA_PHDO_MASK ,
    NVME_PMA_PMT_MASK

};

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🦋 Constants 🦋

six shifts, six masks, twelve icons in total, and every single one of them is doing its little job 🫶 the shifts move the bits into place, the masks pick them back out. iconic behavior, honestly.

the shift squad (move it, move it) 💫

• NVME_PMA_PME_SHIFT — the shift amount that gets you the power measurement enable. yes, the enable one. the main character.
• NVME_PMA_NCPDF_SHIFT — the shift amount that gets you the non-contiguous power data flag 🚩
• NVME_PMA_EPF_SHIFT — the shift amount that gets you the estimated power flag. estimated! not confirmed! 🙈
• NVME_PMA_MIPWRTS_SHIFT — the shift amount that gets you the maximum interval power timestamp support ⏱️ big timestamp energy.
• NVME_PMA_PHDO_SHIFT — the shift amount that gets you the power histogram descriptor overflow. say that five times fast, i dare you 💀
• NVME_PMA_PMT_SHIFT — the shift amount that gets you the power measurement type. the type, bestie, not the measurement itself. know the difference ✨

the mask brigade (pick it back out) 🎭

• NVME_PMA_PME_MASK — the mask that gets you the power measurement enable. same field, opposite direction, we love a symmetrical queen 👑
• NVME_PMA_NCPDF_MASK — the mask that gets you the non-contiguous power data flag 🚩
• NVME_PMA_EPF_MASK — the mask that gets you the estimated power flag 💭
• NVME_PMA_MIPWRTS_MASK — the mask that gets you the maximum interval power timestamp support ⏱️
• NVME_PMA_PHDO_MASK — the mask that gets you the power histogram descriptor overflow 📊
• NVME_PMA_PMT_MASK — the mask that gets you the power measurement type 🌈

ngl, every one of these is described exactly the same way as its shift sibling — the shift moves the bits, the mask grabs them. do not mix them up, i'm begging 🙏

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okay that's the whole page, no cap 💅 it's giving short and sweet, and you ate it up fr fr. 🍓

and a lil sign-off for the record books: this page is enum nvme_pma out of the libnvme(9) manual, dated October 2026 — the source/version and date are right here in the credits because we always give credit, periodt 🫶✨