libnvme(2)

💖 libnvme(2) — enum nvme_lm_cdq_fields 💖

okay bestie, welcome to the cutest little corner of the libnvme API manual 🌸 this one's all about enum nvme_lm_cdq_fields, aka the Controller Data Queue command fields. it's giving "bit-twiddling but make it fashion" ✨

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NAME 🎀

enum nvme_lm_cdq_fields — Controller Data Queue command fields. that's it, that's the whole vibe. 💅

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SYNOPSIS 🦋

here's the whole enum, verbatim, no notes, exactly as it lives in the header:

enum nvme_lm_cdq_fields {
    NVME_LM_CDQ_MOS_SHIFT ,
    NVME_LM_CDQ_MOS_MASK ,
    NVME_LM_CDQ_SEL_SHIFT ,
    NVME_LM_CDQ_SEL_MASK ,
    NVME_LM_SEL_CREATE_CDQ ,
    NVME_LM_SEL_DELETE_CDQ ,
    NVME_LM_QT_SHIFT ,
    NVME_LM_QT_MASK ,
    NVME_LM_CQS_SHIFT ,
    NVME_LM_CQS_MASK ,
    NVME_LM_QT_USER_DATA_MIGRATION_QUEUE ,
    NVME_LM_CREATE_CDQ_PC ,
    NVME_LM_CREATE_CDQ_CNTLID_SHIFT ,
    NVME_LM_CREATE_CDQ_CNTLID_MASK ,
    NVME_LM_DELETE_CDQ_CDQID_SHIFT ,
    NVME_LM_DELETE_CDQ_CDQID_MASK ,
    NVME_LM_CREATE_CDQ_CDQID_SHIFT ,
    NVME_LM_CREATE_CDQ_CDQID_MASK

};

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Constants ✨

bestie these are the constants and you're gonna know every single one, no skipping, no skimming, we're doing this properly 🫶

• NVME_LM_CDQ_MOS_SHIFT — the shift you use to set the Management Operation Specific (MOS) field 🌈
• NVME_LM_CDQ_MOS_MASK — the mask you use to set the MOS field, its ride-or-die partner 💖
• NVME_LM_CDQ_SEL_SHIFT — shift to set the Select (SEL) field
• NVME_LM_CDQ_SEL_MASK — mask to set the SEL field
• NVME_LM_SEL_CREATE_CDQ — the Create CDQ select option 🎀
• NVME_LM_SEL_DELETE_CDQ — the Delete CDQ select option 💀
• NVME_LM_QT_SHIFT — how much you shift to set the Queue Type (QT) field relative to MOS, lowkey important 👀
• NVME_LM_QT_MASK — mask to set the QT field relative to MOS
• NVME_LM_CQS_SHIFT — shift amount for the Create Queue Specific (CQS) field 🌸
• NVME_LM_CQS_MASK — mask to set the CQS field
• NVME_LM_QT_USER_DATA_MIGRATION_QUEUE — User Data Migration Queue type 🦋 iconic honestly
• NVME_LM_CREATE_CDQ_PC — Physically Contiguous (PC)
• NVME_LM_CREATE_CDQ_CNTLID_SHIFT — shift amount to set the CNTLID field relative to MOS
• NVME_LM_CREATE_CDQ_CNTLID_MASK — mask to set the CNTLID field relative to MOS
• NVME_LM_DELETE_CDQ_CDQID_SHIFT — shift amount to set the CDQID field for deletion 🗑️
• NVME_LM_DELETE_CDQ_CDQID_MASK — mask to set the CDQID field for deletion
• NVME_LM_CREATE_CDQ_CDQID_SHIFT — shift amount to get the CDQID field from the Create response in completion dword0 ⭐
• NVME_LM_CREATE_CDQ_CDQID_MASK — mask to get the CNTLID field from the Create response in completion dword0 (yes bestie, that's what it says, and we keep it exactly like that 🙈)

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ngl there's a lot of shifting and masking happening here, so if you're poking at these raw, double-check before you commit, fr fr. 💜

that's the whole page, you ate it, periodt 👑 this came from the libnvme manual, enum nvme_lm_cdq_fields section, dated July 2026 — mwah, go slay your CDQ commands bestie 💅💖