libnvme(2)

okay so bestie, this is the libnvme(2) API manual and we're doing a whole deep dive on enum nvme_cmbsz — no cap. It's giving controller memory buffer size energy, and honestly? iconic. 🫶

✨ NAME ✨

enum nvme_cmbsz — this field indicates the controller memory buffer size, periodt. 💅

🦋 SYNOPSIS 🦋

enum nvme_cmbsz {
    NVME_CMBSZ_SQS_SHIFT ,
    NVME_CMBSZ_CQS_SHIFT ,
    NVME_CMBSZ_LISTS_SHIFT ,
    NVME_CMBSZ_RDS_SHIFT ,
    NVME_CMBSZ_WDS_SHIFT ,
    NVME_CMBSZ_SZU_SHIFT ,
    NVME_CMBSZ_SZ_SHIFT ,
    NVME_CMBSZ_SQS_MASK ,
    NVME_CMBSZ_CQS_MASK ,
    NVME_CMBSZ_LISTS_MASK ,
    NVME_CMBSZ_RDS_MASK ,
    NVME_CMBSZ_WDS_MASK ,
    NVME_CMBSZ_SZU_MASK ,
    NVME_CMBSZ_SZ_MASK ,
    NVME_CMBSZ_SZU_4K ,
    NVME_CMBSZ_SZU_64K ,
    NVME_CMBSZ_SZU_1M ,
    NVME_CMBSZ_SZU_16M ,
    NVME_CMBSZ_SZU_256M ,
    NVME_CMBSZ_SZU_4G ,
    NVME_CMBSZ_SZU_64G

};

🌸 Constants 🌸

• NVME_CMBSZ_SQS_SHIFT — the shift amount to get the submission queue support. it literally slides the bits into place, iykyk.
• NVME_CMBSZ_CQS_SHIFT — the shift amount to get the completion queue support. completion queen behavior.
• NVME_CMBSZ_LISTS_SHIFT — the shift amount to get the PLP SGL list support. lists? we love lists.
• NVME_CMBSZ_RDS_SHIFT — the shift amount to get the read data support. reading is fundamental bestie.
• NVME_CMBSZ_WDS_SHIFT — the shift amount to get the write data support. writing? also fundamental.
• NVME_CMBSZ_SZU_SHIFT — the shift amount to get the size units. units!! so we know what scale we're on.
• NVME_CMBSZ_SZ_SHIFT — the shift amount to get the size. yes, THE size. main character number.
• NVME_CMBSZ_SQS_MASK — mask to get the submission queue support. masking is self-care.
• NVME_CMBSZ_CQS_MASK — mask to get the completion queue support.
• NVME_CMBSZ_LISTS_MASK — mask to get the PLP SGL list support.
• NVME_CMBSZ_RDS_MASK — mask to get the read data support.
• NVME_CMBSZ_WDS_MASK — mask to get the write data support.
• NVME_CMBSZ_SZU_MASK — mask to get the size units.
• NVME_CMBSZ_SZ_MASK — mask to get the size.
• NVME_CMBSZ_SZU_4K — 4 KiB. tiny but fierce 🎀
• NVME_CMBSZ_SZU_64K — 64 KiB. a lil bigger, still cute.
• NVME_CMBSZ_SZU_1M — 1 MiB. now we're talking.
• NVME_CMBSZ_SZU_16M — 16 MiB. lowkey spacious.
• NVME_CMBSZ_SZU_256M — 256 MiB. highkey roomy.
• NVME_CMBSZ_SZU_4G — 4 GiB. big slay energy 🔥
• NVME_CMBSZ_SZU_64G — 64 GiB. huge. massive. periodt. 👑

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mwah 💋 this was the enum nvme_cmbsz page from libnvme(2), dated July 2026. stay nerdy, stay hydrated 🦋✨