ib_umem_get_desc(9)

hiii bestie 💖 welcome to ib_umem_get_desc(9) from the Kernel API Manual — this page is literally about pinning a umem from a buffer descriptor, and it's giving kernel-core realness ✨

🌸 NAME 🌸

ib_umem_get_desc — pin a umem from a buffer descriptor. That's the whole name, no cap 🎀

✨ SYNOPSIS ✨

       struct ib_umem * ib_umem_get_desc (struct ib_device *device , const
       struct ib_uverbs_buffer_desc *desc , int access );

that's the signature, bestie — keep it exact 👑

🎀 ARGUMENTS 🎀

• device — the IB device, periodt.
• desc — a buffer descriptor; it can be VA or DMABUF, iykyk.
• access — the IB access flags, literally.

💖 RETURN 💖

On success? You get a caller-owned umem 💅. On error? It's ERR_PTR(...) 😭. No in-between energy.

🦋 SEE ALSO 🦋

Go check the kernel file ./drivers/infiniband/core/umem.c and these besties:

• ib_umem_find_best_pgsz(9)
• ib_umem_get_attr(9)
• ib_umem_get_attr_or_va(9)
• ib_umem_get_cq_buf(9)
• ib_umem_get_cq_buf_or_va(9)
• ib_umem_release(9)

okay that's the whole page! this cutie's source/version is ./drivers/infiniband/core, and the date on it is October 2026 — ib_umem_get_desc(9), signing off 💜🫶