libnvme(9)

💖 libnvme(9) — enum nvme_id_ctrl_frmw 💖

okay so bestie, welcome to the libnvme API manual, page 9 of the section, and today's main character is a little enum that's literally all about what your controller can and can't do when you try to shove new firmware at it. yes, we're in our firmware-update era. 🦋

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✨ NAME ✨

enum nvme_id_ctrl_frmw — Flags and values that indicate capabilities regarding firmware updates, straight out of &struct nvme_id_ctrl.frmw. iykyk. 🎀

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🌸 SYNOPSIS 🌸

enum nvme_id_ctrl_frmw {
    NVME_CTRL_FRMW_FFSRO_SHIFT ,
    NVME_CTRL_FRMW_NOFS_SHIFT ,
    NVME_CTRL_FRMW_FAWR_SHIFT ,
    NVME_CTRL_FRMW_SMUD_SHIFT ,
    NVME_CTRL_FRMW_FFSRO_MASK ,
    NVME_CTRL_FRMW_NOFS_MASK ,
    NVME_CTRL_FRMW_FAWR_MASK ,
    NVME_CTRL_FRMW_SMUD_MASK ,
    NVME_CTRL_FRMW_FFSRO ,
    NVME_CTRL_FRMW_NOFS ,
    NVME_CTRL_FRMW_FAWR ,
    NVME_CTRL_FRMW_SMUD

};

look at her. twelve constants, one enum, zero notes. 💅

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👑 Constants 👑

okay so this is the whole squad — four shifts, four masks, four actual values. not me being obsessed with how tidy this is. 🫶

• NVME_CTRL_FRMW_FFSRO_SHIFT — the FFSRO shift 💫
• NVME_CTRL_FRMW_NOFS_SHIFT — the NOFS shift 💫
• NVME_CTRL_FRMW_FAWR_SHIFT — the FAWR shift 💫
• NVME_CTRL_FRMW_SMUD_SHIFT — the SMUD shift 💫
• NVME_CTRL_FRMW_FFSRO_MASK — the FFSRO mask 🎭
• NVME_CTRL_FRMW_NOFS_MASK — the NOFS mask 🎭
• NVME_CTRL_FRMW_FAWR_MASK — the FAWR mask 🎭
• NVME_CTRL_FRMW_SMUD_MASK — the SMUD mask 🎭
• NVME_CTRL_FRMW_FFSRO — if this one's set, the first firmware slot is readonly. respect her boundaries fr fr. 🔒
• NVME_CTRL_FRMW_NOFS — mask to get the value of the number of firmware slots that the controller supports. that's how many slots you're working with, bestie. 🔢
• NVME_CTRL_FRMW_FAWR — if set, the controller supports firmware activation without a reset. no reboot, just vibes. ✨
• NVME_CTRL_FRMW_SMUD — if set, the controller is able to detect overlapping firmware/boot partition image update. she's paying attention, she sees everything 👀💀

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lowkey a reminder: these are described exactly as the API spells them out — shifts, masks, and values — so don't go reading extra behaviour into them that isn't here. 💜

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and that's the page, bestie! 🎀 this was the enum nvme_id_ctrl_frmw page from the libnvme API Manual, dated October 2026 — mwah, go update some firmware responsibly, ily 🫶💖