libnvme(2)

✨ NAME ✨

ok so bestie, gather round 💖 this page is the whole vibe on struct nvme_host_mem_buf_attrs — aka the Host Memory Buffer - Attributes Data Structure. it's giving "the receipts for the memory the host promised to hand over" 💅

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🌸 SYNOPSIS 🌸

struct nvme_host_mem_buf_attrs {
    __le32 hsize;
    __le32 hmdlal;
    __le32 hmdlau;
    __le32 hmdlec;
    __u8 rsvd16[4080];
 };

literally just the blueprint, no cap 🫶 four juicy little __le32 fields up top and then a whole 4080 bytes of reserved space just sitting there being mysterious. main character energy honestly.

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🎀 Members 🎀

• hsize — Host Memory Buffer Size 💖 how big the host memory buffer actually is. the whole "how much room we're working with" moment.
• hmdlal — Host Memory Descriptor List Lower Address 🌸 the lower half of the address of the Host Memory Descriptor List. yes, it's split in two. we love a two-part address situation.
• hmdlau — Host Memory Descriptor List Upper Address 🦋 the upper half of that same Host Memory Descriptor List address. hmdlal + hmdlau = the full address. iconic duo behavior, fr fr.
• hmdlec — Host Memory Descriptor List Entry Count 🔥 how many entries are in the Host Memory Descriptor List. the headcount. the guest list. the way that it counts the entries… obsessed.
• rsvd16 — Reserved 💀 4080 bytes of pure reserved silence. do NOT touch. it is not yours. it is not for you. leave it alone bestie 🙈

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⚠️ heads up: rsvd16 is Reserved — hands off, no improvising, no sneaking your own data in there. that's the rules. ⭐

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and that's the whole page, periodt 💜 this beauty lives up in libnvme (that's section 2 of the API manual, for the record — group-chat equivalent of "it's in the api docs channel"). it's stamped July 2026, all about struct nvme_host_mem_buf_attrs, and yeah it's still rocking the libnvme(2) title card like the queen she is 👑 stay hydrated, read your structs, mwah 🧚🍓